adsense 5.x-1.3

Changes since DRUPAL-5--1-2:

• Added missing header comment blocks.
• After adding missing header comment blocks, the translation template had to be updated.
• #104603 Added square 250x250 ad, by inactivist
• #105136 Check if profile module exists before searching for profile field, by Rob Roy.
• #105219 Make section targeting constants global for use in other modules, by dkruglyak
• #106202 Honor visibility settings even when ads are disabled, by ByteEnable
• #105817 Private functions need to follow namespace rules, by RobRoy
• #110878 Increase number of blocks to 8
  Attempt to fix caching issue with filters by not caching filters at all,
  this should take care of #105824 and #116114
• Remove redundant breaks.