some changes
	modified:   eZLib/src/eZLib/Math/Er.java
	modified:   eZLib/src/eZLib/Math/M.java
	new file:   eZLib/src/eZLib/Math/Mx.java
	new file:   eZLib/src/eZLib/Math/Mx3.java
	modified:   eZLib/src/eZLib/Math/V.java
	new file:   eZLib/test/eZLib/Mx3Test.java