Create README.md
Update README.md
Revert ec026a1..e5e609f

This rolls back to commit ec026a13a3ebecd7a0a5fd7570532f775f3bc23c.
Merge remote-tracking branch 'upstream/master'

Updates upstream Snap4Arduino
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,
..
}
Define srpite.arduino.board as instance object

The previous - prototype - definition made the object shared among all
sprite instances
Merge pull request #18 from elaval/master

Board local to the sprite