Merge origin/master

Conflicts:
	src/main/java/weka/classifiers/trees/Labb1.java

change implemention of giniIndex
Merge origin/master

Conflicts:
	src/main/java/weka/classifiers/trees/Labb1.java

change implemention of giniIndex
Merge origin/master

Conflicts:
	src/main/java/weka/classifiers/trees/Labb1.java