Split Arduino ADK into separate board
Removed incorrect readme
Combine Mega and Mega 2560
Fixed adc_init() function.

See #1418
Merge branch 'mega-adk' of github.com:Lauszus/Arduino into Lauszus-mega-adk
Small fixes to avr/boards.txt:

- adjusted Mega board name
- moved pid/vid to the proper place
- defined default build.board prop (so the IDE stops warning about that)

See #1605
Merge branch 'ide-1.5.x' into ide-1.5.x-jssc
It was still using jdk FileNameExtensionFilter
Added another macos system profiler test
Merge branch 'ide-1.5.x' into ide-1.5.x-jssc