dead animals can no longer wander
test-branch commit.
Merge pull request #1 from fabbo/test-branch

test-branch commit.
another branch-test.
First SoundPlayer draft
Global refactoring: echoes.core.* no longer depends on Processing
Global refactoring: SoundPlayer depends no longer on Processing and
Minim
Merge remote-tracking branch 'origin/sound-player' into dev

Conflicts:
	echoes/src/echoes/Echoes.java
First draft of Singing
Bugfix: point-to-point distance
Bug fix: OMG! Division by zero!
Merge remote-tracking branch 'origin/dev' into singing-creatures
Refactoring: "Singing" interface is now named "Singer"
Refactoring
Removed useless imports
Added toString
Minor change for Coords2D: toString()
Added SoundVehicle and relative interactions with Singer animals
Created Note class
Singer animals can sing a song (starting a new thread)