some changes
	modified:   .gitignore
	new file:   eZLib/inclusion_exclusion.pdf
	new file:   eZLib/nbproject/configs/Study.IncExc.properties
	new file:   eZLib/src/Study/InclusionExclusion/IncExcApplet.java
	new file:   eZLib/src/Study/InclusionExclusion/IncExcFrame.java
	new file:   eZLib/src/Study/InclusionExclusion/IncExcSketch.java
	modified:   eZLib/src/eZLib/Geometry.java