LERGO-422, LERGO-423, LERGO-424, LERGO-425, LERGO-426.

implemented filters in backend for lessons, questions and reports.
Merge remote-tracking branch 'origin/develop' into develop

Conflicts:
	app/index.html
	app/scripts/controllers/reports/Index.js
LERGO-422, LERGO-423, LERGO-424, LERGO-425, LERGO-426.

removing debug output on html.