some more PA tests
Merge branch 'master' of
https://github.com/erelsgl/machine-learning-server.git

Conflicts:
	train.js
Merge branch 'master' of
https://github.com/erelsgl/machine-learning-server.git

Conflicts:
	classifierSettings.js
	train.js
demos
Merge branch 'master' of https://github.com/erelsgl/machine-learning-server.git
Merge branch 'master' of https://github.com/erelsgl/machine-learning-server.git
add a test option