Definitely fixed #5 and #6, and pushed it to all 3 releases
Merge remote-tracking branch 'upstream/master'

Sync with upstream/master
Replace global board with Sprite board

Each Sprite now has a new object “arduino” which contains the board
and other arduino related properties:

sprite.arduino = {
board : undefined,
connecting: false,
..
}
Merge branch 'master' into makers

Conflicts:
release/gnu/Snap4Arduino.tar.gz
release/gnu/Snap4Arduino/app.nw
release/osx/Snap4Arduino.app/Contents/Resources/app.nw
release/osx/Snap4Arduino.zip
release/win32/app.nw
Define srpite.arduino.board as instance object

The previous - prototype - definition made the object shared among all
sprite instances
Change gitignore
Remove hidden  .s4a* files
Merge