Thanks to @JDRoberts advice of 'go do more research 
and @AdamV code examples to look at version 1.1 now supports all 16 functions in a hopefully fairly standard manner.
Smartlighting sees 8 buttons
1-4 Pushed and Hold work very obviously
5-8 Pushed and Hold are actually 1-4 Double Tap and 1-4 Hold release respectively.
Not sure how much use hold release will really be unless you start using core and set up complicated conditions 
Common use i guess will be Button 1 - 4 push and hold along with button 5-8 push to get access to the double tap event.
If you have already added version 1.0 DTH and replace it with this code then go into device details in IDE and reselect the DTH so it re-runs the initialise code to send the numberofbuttons command otherwise you will still see only 4 buttons in Smartlighting.
/**
* Copyright 2015 SmartThings
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License
* for the specific language governing permissions and limitations under the License.
*
* ===== Nodon Octan =====
*
* Modified for NodOn Octan Remote (CRC-3-1-0x) by Richard_Woodward
*
* Octan supports 4 actions per button Pushed
* Double Tap
* Held
* Hold Released
*
* v1.01 Updated to support all 16 actions:
*
* As Smartlighting can only support type "Pushed" or "Hold" events the extra 4 functions have been mapped to
* fictional buttons 5 through 8.
*
* Button 1 double Tap is mapped to "Button 5 Pushed" in smartlighting
* Button 1 Hold Release is mapped to "Button 5 Hold" in smarlighting
* .
* Button 4 double Tap is mapped to "Button 8 Pushed" in Smartlighting
* Button 4 Hold Rlease is mapped to "Button 8 Hold" in Smartlighting
*
*/
metadata {
definition (name: "Aeon Key Fob", namespace: "smartthings", author: "SmartThings") {
capability "Actuator"
capability "Button"
capability "Holdable Button"
capability "Configuration"
capability "Sensor"
capability "Battery"
fingerprint deviceId: "0x0101", inClusters: "0x86,0x72,0x70,0x80,0x84,0x85"
}
simulator {
status "button 1 pushed": "command: 2001, payload: 01"
status "button 1 held": "command: 2001, payload: 15"
status "button 2 pushed": "command: 2001, payload: 29"
status "button 2 held": "command: 2001, payload: 3D"
status "button 3 pushed": "command: 2001, payload: 51"
status "button 3 held": "command: 2001, payload: 65"
status "button 4 pushed": "command: 2001, payload: 79"
status "button 4 held": "command: 2001, payload: 8D"
status "wakeup": "command: 8407, payload: "
}
tiles {
standardTile("button", "device.button", width: 2, height: 2) {
state "default", label: "", icon: "st.unknown.zwave.remote-controller", backgroundColor: "#ffffff"
state "button 1 pushed", label: "pushed #1", icon: "st.unknown.zwave.remote-controller", backgroundColor: "#79b821"
state "button 2 pushed", label: "pushed #2", icon: "st.unknown.zwave.remote-controller", backgroundColor: "#79b821"
state "button 3 pushed", label: "pushed #3", icon: "st.unknown.zwave.remote-controller", backgroundColor: "#79b821"
state "button 4 pushed", label: "pushed #4", icon: "st.unknown.zwave.remote-controller", backgroundColor: "#79b821"
state "button 1 held", label: "held #1", icon: "st.unknown.zwave.remote-controller", backgroundColor: "#ffa81e"
state "button 2 held", label: "held #2", icon: "st.unknown.zwave.remote-controller", backgroundColor: "#ffa81e"
state "button 3 held", label: "held #3", icon: "st.unknown.zwave.remote-controller", backgroundColor: "#ffa81e"
state "button 4 held", label: "held #4", icon: "st.unknown.zwave.remote-controller", backgroundColor: "#ffa81e"
}
valueTile("battery", "device.battery", inactiveLabel: false, decoration: "flat") {
state "battery", label:'${currentValue}% battery', unit:""
}
main "button"
details(["button", "battery"])
}
}
def parse(String description) {
def results = []
if (description.startsWith("Err")) {
results = createEvent(descriptionText:description, displayed:true)
} else {
def cmd = zwave.parse(description, [0x80: 1, 0x84: 1])
//log.debug("cmd=$cmd")
if(cmd) results += zwaveEvent(cmd)
if(!results) results = [ descriptionText: cmd, displayed: false ]
}
//log.debug("Parsed '$description' to $results")
return results
}
def zwaveEvent(physicalgraph.zwave.commands.wakeupv1.WakeUpNotification cmd) {
def results = [createEvent(descriptionText: "$device.displayName woke up", isStateChange: false)]
def prevBattery = device.currentState("battery")
if (!prevBattery || (new Date().time - prevBattery.date.time)/60000 >= 60 * 53) {
results << response(zwave.batteryV1.batteryGet().format())
log.debug(" read battery")
}
results += configurationCmds().collect{ response(it) }
results << response(zwave.wakeUpV1.wakeUpNoMoreInformation().format())
return results
}
def buttonEvent(button, held) {
button = button as Integer
held = held as Integer
//log.debug("button=$button Held=$held")
if( held == 1) {
def ebutton = button +4
createEvent(name: "button", value: "held", data: [buttonNumber: ebutton], descriptionText: "$device.displayName button $ebutton was pushed", isStateChange: true)
}
else if (held == 2) {
createEvent(name: "button", value: "held", data: [buttonNumber: button], descriptionText: "$device.displayName button $button was held", isStateChange: true)
}
else if (held==3) {
def ebutton = button +4
createEvent(name: "button", value: "pushed", data: [buttonNumber: ebutton], descriptionText: "$device.displayName button $ebutton was pushed", isStateChange: true)
}
else if (held == 0) {
createEvent(name: "button", value: "pushed", data: [buttonNumber: button], descriptionText: "$device.displayName button $button was pushed", isStateChange: true)
}
}
def zwaveEvent(physicalgraph.zwave.commands.sceneactivationv1.SceneActivationSet cmd) {
Integer button = (cmd.sceneId / 10) as Integer
Integer held = cmd.sceneId - (button*10) as Integer
buttonEvent(button, held)
}
def zwaveEvent(physicalgraph.zwave.commands.batteryv1.BatteryReport cmd) {
def map = [ name: "battery", unit: "%" ]
if (cmd.batteryLevel == 0xFF) {
map.value = 1
map.descriptionText = "${device.displayName} has a low battery"
} else {
map.value = cmd.batteryLevel
}
createEvent(map)
}
def zwaveEvent(physicalgraph.zwave.Command cmd) {
[ descriptionText: "$device.displayName: $cmd", linkText:device.displayName, displayed: false ]
}
def configurationCmds() {
delayBetween([ zwave.configurationV1.configurationSet(parameterNumber: 250, scaledConfigurationValue: 1).format(),
// zwave.associationV1.associationSet(groupingIdentifier: 2, nodeId: zwaveHubNodeId).format(),
// zwave.associationV1.associationSet(groupingIdentifier: 3, nodeId: zwaveHubNodeId).format(),
// zwave.associationV1.associationSet(groupingIdentifier: 4, nodeId: zwaveHubNodeId).format(),
// zwave.associationV1.associationSet(groupingIdentifier: 5, nodeId: zwaveHubNodeId).format(),
zwave.configurationV1.configurationSet(configurationValue: [1], parameterNumber: 3, size: 1).format(),
zwave.configurationV1.configurationSet(configurationValue: [3], parameterNumber: 8, size: 1).format(),
zwave.associationV1.associationSet(groupingIdentifier:1, nodeId:zwaveHubNodeId).format() ],500)
}
def configure() {
def cmd = configurationCmds()
//log.debug("Sending configuration: $cmd")
return cmd
}
def installed() {
initialize()
}
def updated() {
initialize()
}
def initialize() {
sendEvent(name: "numberOfButtons", value: 8)
log.debug("Sent numberOfButtons 8")