some changes
	modified:   eZLib/src/eZLib/Physics/Body.java
	modified:   eZLib/src/eZLib/Physics/Force.java
	renamed:    eZLib/src/eZLib/Physics/Gravity.java -> eZLib/src/eZLib/Physics/Gravitation.java
	modified:   eZLib/src/eZLib/Physics/Resistance.java
	modified:   eZLib/src/eZLib/Study/FluideResSketch.java
	modified:   eZLib/src/eZLib/Study/ForceSketch.java
	modified:   eZLib/src/eZLib/Study/FrictionSketch.java
	modified:   eZLib/src/eZLib/Study/SolarSystem/SunSysSketch.java