Buildsystem/Linux: Deprecate and remove use of FindTermcap.cmake - it was only used as a solution for older CentOS versions

Core/Genrevision: Move defines from SystemConfig.h file into into revision.h (might need a rename now?) and delete it.
This should remove the infamous "rebuild all of game plzkthx"-symptom when upgrading to newer revisions.

--HG--
branch : trunk

src/server/game/Server/Protocol/Handlers/CharacterHandler.cpp

@@ -18,10 +18,11 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
+#include "revision.h"
+
 #include "Common.h"
 #include "ObjectAccessor.h"
 #include "ObjectMgr.h"
-#include "SystemConfig.h"
 #include "World.h"
 #include "WorldPacket.h"
 #include "WorldSession.h"