Added ZDP UserDescSetCommand and UserDescConfCommand
Added ZDP ExtendedSimpleDescReqCommand and ExtendedSimpleDescRspCommand
Fix in NwkAddrRspCommandTest for test that did not run because it's name did not start with test
Changed display of Endpoint from decimal to hexadecimal
Minor improvements

* small:
  Changed display of Endpoint from decimal to hexadecimal
  Fix in NwkAddrRspCommandTest for test that did not run because it's name did not start with test
Start index is no longer optional in IEEE address request and NWK address request.

See 2.4.3.1.2 and 2.4.3.1.1 of the Zigbee spec.
Fixed broken test.
Merge pull request #5 from fversnel/master

Start index not optional in ZDP IEEE and NWK addr request
Added travis integration
Added travis integration with composer
Added the ZDP Network Req Commands that only have a StartIndex in their payload.
Added the MgmtLqiRspCommandand the NeighborDescriptor structure
Added type hinting for addNeighborDescriptor
Added MgmtRtgRspCommand with RoutingDescriptor struct
Merge branch 'master' into stable