Version 1.0.0 Initial Release
1.1
    - change /css/themes/ to /css/galleria_theme/ for better integration on other packages (themes). also js folder.
    - change the way theme resources loads css files.
1.2
    - fixed error on 5.6.2.1
1.2.1
    - add file title as the tooltip at editing UI.
1.2.5
    - make add-on compatible with 5.5.0+

1.3
    - add a light theme for use on bright backgrounds.
    - fix theme loader