avatar_selection 5.x-2.2

Changes since DRUPAL-5--2-1:

• fix for deleting of images as reported in #162439
• patch for #163903 where the module was preventing access to all private files except ones in avatar_selection folder.
• Added in changes for feature request #163417. These changes allow users to
  limit the selection of avatars available to a user based on their organic group subscriptions. This can be combined with the access roles as well. The layout of the configuration screens also had to change.
• changes for #169129 - separates out the requirement to force users to select an
  avatar between user registration and editing a user account later.
• fixed issue with _avatar_selection_image_list() for the admin screen
• modified general config form so when disable uploads is checked, it's possible to force users to select an avatar
• fixed incorrect t() usage