WowAce

Adirelle:
    - Renamed the files to match the project name (widget => widgetS) as it defines several widgets anyway.
    - Added .pkgmeta.
    - Added localization as well as specific text display for each kind of ActionSlot.
    - Fixed ation slots specific to a type (item, spell, ...).
    Fixed picking up a companion spell from the slot.
    Properly handle action dragged from action bars.
    - Trimmed trailing whitespaces.
    - Added specific widgets restricte to item, spell, macro or equipment sets.
    - First working version.