updated/created some classes

Coordinate : added some method to use the class
Entity : added some methods/constructors and inheritance to match the
soon release of the v0.1 specs
MovingEntity : new class to upgrade the mother class Entity and ables it
to move
DirectionLineCoefficient : added this class to allow a MovingEntity to
rotate on a 2D dimension map
Merge branch 'master' of
https://github.com/sebastienjean/iutvalence-java-mp-2013-2014-ie1-p4.git

Conflicts:
	src/fr/iutvalence/java/mp/NomProjet/Coordinate.java
	src/fr/iutvalence/java/mp/NomProjet/Entity.java
	
Fixe prioritary todos in the process