Blender Git Loki

== userprefs: addons ==

- From now on addons bl_addon_info['name'] doesn't need to specifcy also the category, it is put automatically in the addon box title
In some script category and the category in the title were not matching, this had to be fixed manually.

- The warning icon is at the right of the addon box title, so that it cant disalign the addon name anymore when we have a warning.

- After discussing with Campbell, I've added the field bl_addon_info['api'] where we should specify the Blender API version number the addon is
compatible with.
This is certainly useful for clarity, and also I need it in place while preparing the downloadable addons.

- Also, bl_addon_info['version'] is now assumed to be a tuple of integers as it is bl_addon_info['blender'].
Any important text should be placed in the bl_addon_info['warning'] field, not in the script version anymore.
I'm going to reflect this change in bf-extensions so that scripts won't suddenly break.