Changes:
* Changed MINAlbumItem to include path to server if it's not a custom item
* Changed ImageViewer:
      > ActionBar shows
      > Share buttons appear
      > Close button appears
      > ActionBar now shows image name
      > ActionBar back closes the image viewer
      > Thumbnails are now spaced correctly
      > Thumbnails keep the appropriate aspect ratio
      > Reversed the direction that swiping changes the photos to match iPad/iPhone