Added NXTPostMan Interface and namespace
Moved NXTEncoder, created postman class, added enum NXTMessageType, added NXTMessage struct
Added unittest for PostMan Class.
Added UnitTest for Postman method SendMessage
Added SendMessage Method to postman
Fixed problem with Sendmessage methods in the postman class
added unittest for sendmessage with ICoordinate
Made changes to NXT files
Merge branch 'master' of https://github.com/deaddog/sw505-code