Distorted lines in `diff`

Distorted lines in `diff` when viewing files `windows-style-line-separator: \r\n`
Description to groups added
Description added to temas
Spinach tests fixed
Description added to user temas factory
Table description indentation fixed
Desctiptions removed from dashboard
Tests for team and group descriptions added
Missing descriptions added
Css classes improved
Fixed notes from randx
allow any attachment filenames
docs improvement
Merge pull request #3114 from Un1matr1x/docs

docs improvement
fix admin users tests
try to use stable version for database cleaner
update devise gem
update httparty
update stamp
use grit_ext 0.6.2