Patch 3116577: Plane equality operators.  Also cleaned up some documentation.
Patch 3116577: Plane equality operators.  Also cleaned up some documentation.

--HG--
branch : v1-7

digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre