Addition of new models, controller and view for tagging project.
Merge pull request #1818 from bmuscede/tagging

Addition of new models, controller and view for tagging project.
Improvement of new tags view
Merge branch 'tagging' of git://github.com/MarkUsProject/Markus into tagging
Merge pull request #1831 from bmuscede/tagging

Improvement of new tags view
Added tag functionality for submission view
Merge branch 'tagging' of git://github.com/MarkUsProject/Markus into tagging
Improved CSS organization and first prototype of results view tagging
Improved Results Prototype for Tagging
migrationfiles
Merge branch 'tagging' of https://github.com/MarkUsProject/Markus into tagging
few changes to the migration files
models
Merge pull request #1853 from bmuscede/tagging

Addition of Tagging Features for Submissions & Results Views
Merge pull request #1854 from nathanychow/tagging

migration files
tagging: added some backend logic to create and retrieve tags.  made changes to the migration files
trying to fix some Hound errors
hound errors
hound errors
setting association between tag and assignment