Added more ZTC generic messages.
Added getchannel confirm/request and getmode confirm/request messages.
Added GetNumOfMsgs request/confirm pair and GetPanId request/confirm pair.
Moved the status constants into consts.js file.
Updated index.js in order to include all the messages.
Moved the mode constants to consts.js and added the ModeSelect Request/Confirm frames.
Added the NVGetDataSetDesc Request/Confirm pair and NVGetPageHeaders Request/Confirm pair.
Added the Ping Request/Confirm pair.
Added the ReadExtAddress Request/Confirm pair.
Completed all the ZTC frames.
Refactored ZTC frames within the ZTC packages.
Added the ClearDeviceKeyPairSet Request/Confirm pair.
Added ConfirmIdReport message.
Added DataFragment Request/Indication message.
Refactored APS messages specifications.
Added the time method to parser/builder reading/writing moment(s).
Added ASPDE messages.
Added the DeregisterEndpoint Request/Confirm message pair.
Migrated unit test and base libraries to coffeescript

Signed-off-by: Mauro Franceschini <mauro.franceschini@gmail.com>
Added .gitignore for both test and lib.