Adding tests to travis
Merge branch 'master' of github.com:qminer/qminer
Fixed bug in TJsIndexKey for keys without vocabulary
doc
Example update
Merge branch 'master' of github.com:blazf/qminer

Conflicts:
	examples/timeseries/src/timeseries.js
Merge branch 'master' of github.com:blazf/qminer
twitter library added