Merge pull request #16 from wsnipex/rebrand

[gtests] fix logfile related tests after rename
[rebrand] - make the system friendly name default to Kodi (seen in airplay announcements and maybe others)
[rebrand/json] - return Kodi as the name when requested via json-rpc
[rebrand/osx] - fix missing var in osx preflight script - SQUASHME
[rebrand/android] use dynamic application name