changed to proper mysql pass
separated AR models from controlers
added md5 and salt for user password. improved security on user creation
user model modifications
Merge remote-tracking branch 'origin/backend' into lvuiui-79

Conflicts:
	app/controllers/groups.rb
Merge pull request #15 from vdanyliv/mmoroz-bg

Mmoroz bg
Revert "Mmoroz bg"
Merge pull request #17 from vdanyliv/revert-15-mmoroz-bg

Revert "Mmoroz bg"
created and modified removed for all  backend models except users
Merge pull request #16 from vdanyliv/lvuiui-79

Lvuiui 79
Update users.rb
Update users.rb

fixed GET users crash
minor adjustments
add group head to groups module
added jasmine gem
add form validation on users grid & align labels
add backbone validation on POST
implement classes module
moved sample tests to project
fix filling form