Added support for changing the sampling rate between positives and negatives in TSvm via UnbalanceWgt parameter (j in the old SVM notation).
Added SplitBy function to TRecSet and it's JS equivalent split, which split record set into a vector of record sets at each place where the split criteria is met.
Fixed comment.
Merge github.com:rupnikj/qminer

Conflicts:
	src/qminer/qminer_js.cpp
Fixed printf bug.
Merge pull request #8 from blazf/master

Split on record set, new SVM, added merger
Merge branch 'master' of github.com:qminer/qminer
minor fix