Added class attribute to in/aws/arff
Finished vectors.
Re-added test in/single-line file
Re-added test in/joined
Moved some in/ files around
Vector is ready
Added Sum and Headers test in/ files.
Fixed SingleLine input index.
Added Sum step
Vectors is ready.
Finished all steps until Weka, not including.
sum can now handle aws/join
Started working on WEKA Learn.java