LB-1637 Added AGPL license.

Updated package.json aswell to reflect AGPL license.
LB-1500: Added css file to default theme.
Merge pull request #108 from nistormihai/master

License and default theme fixes.
LB-1638 Plugins inject own markup
Merge pull request #104 from vladnicoara/plugin-markup-inject

LB-1638 Plugins inject own markup
LB-1586 Add first client side test
Set jshint for tests, refactor unused grunt tasks
LB-1588 Integrate client side (karma) tests with travis
LB-1585 Add first server side test

Also introduce grunt test task (run both client and server tests)
LB-1588 Run server side tests with travis
LB-1585 Add grunt watch task for server side tests