refactoring and doc
Merge branch 'master' of https://github.com/BroTeam/TIPE-project.git

Conflicts:
	src/com/broteam/tipe/model/Simulation.java
Merge branch 'master' of https://github.com/BroTeam/TIPE-project.git

Conflicts:
	src/com/broteam/tipe/model/Simulation.java
	src/com/broteam/tipe/signal/SignalArea.java
	src/com/broteam/tipe/ui/Panel.java
Merge branch 'master' of https://github.com/BroTeam/TIPE-project.git

Conflicts:
	src/com/broteam/tipe/model/elements/Pixel.java
	src/com/broteam/tipe/ui/Panel.java