Extend tag pane column widths
Fix type height in file metadata pane
Same size in file list item and file details pane
Allow multiple tags per vocabulary per file
Update edited/deleted tags using new tagIDs structure
Merge branch 'rc/multiple-tagging' into 'develop'

Rc/multiple tagging

See merge request !9
Don't allow locked terms to be updated/deleted
Upload derivative UI
Download derivatives
Fix double-click nonsense
Merge branch 'rc/upload_derivative' into 'develop'

Rc/upload derivative

See merge request !10
Tweak type height in metadata pane
Update README with 0.6 functionality
Better derivatives form state handling
Increment untagged count after derivative upload
Bump version to 0.6.0