FpDebug: 
 * Added TDbgController class to FpDebug to make it easiear
   to implement a debugger. 
 * Added the package LazFpDebug, which registers a new
   debugger into the IDE that uses FpDebug to debug applications. 


git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@44606 4005530d-fff6-0310-9dd1-cebe43e6787f