Added support for rotation so an app can be rotated and FG will resize and manage...

Added support for rotation so an app can be rotated and FG will resize and manage the window in the background Additional documentation explaining why certain functions are implemented in the manner they are Changed QNX macro to a non deprecated one

git-svn-id: svn+ssh://svn.code.sf.net/p/freeglut/code/trunk/freeglut/freeglut@1670 7f0cb862-5218-0410-a997-914c9d46530a