AJCORE-320 AllJoyn logo removed from generated API document

Change-Id: If912ad00eb9c380ac5e950a8be919aac652b08cc
AJCORE-318 Add trademark symbol API documentation

AllJoyn is a registered trademark. The header and footer should have
a (TM) symbol after the word AllJoyn.

Change-Id: If11c0322e0628ac8c1e5b2072331bea3130f7dc3