Resolve WB-437: Using the arrow key to scroll through the list of help topics was not selecting the topics for help display.
Tested link to other pages in help system
Changed help viewer to allow Qt to perform back/forward navigation.  Overrode QTextBrowser::loadResource() to retrieve the content for help pages and let Qt display it.
Updated Workbench Help Files.
Updated Workbench Help Files.
Fix for FTGL so that is compiles on Mac with GCC-4.9.0