Extendability improvements
Initial work on setting up sorting

Helper functions done, basic sorting working, need to test and check robustness
Recursive sorting completed
Merge branch 'feature/sorting' into develop
Merge branch 'master' into develop
Minor cleaning
Added dropzone file, dropzone option, basic initialization
Mockjax added to bower and gulpfile
Dropzone events as options
Custom upload url from item data working
Basic event hooks, ondelete, onselectrow, ontogglefolder
Columns are no longer hard coded and custom field was added
Updated how we acces id and row in the view
Working on drop zone adding new row
Add file adds row based on response. Need to clean up
Merge branch 'feature/dropzone' into develop
Removing unnecessary code after merge
Move implementation interval to check bug
Move waits for check
Merge branch 'feature/move' into develop