Added voting functionality for videos and comments.
Added comment functionality.

Changed the rating functionality for videos.
Db file changes..
Merge branch 'master' of https://github.com/ipri2013/portalznanja into busho-merge

Conflicts:
	api/resources.py
	sqlite3.db
	web/fixtures/fixture.json
	web/static/css/main_style.css
	web/static/templates/videoStream.html
Merge pull request #17 from busho/master

Comments and voting functionality.