TRAC #22041

Updated the include guard and documentation and updated all locations where
EnumTypes.h was included.

Signed-off-by: Shannon Woods
Signed-off-by: Daniel Koch

Author:    Geoff Lang

git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1417 736b8ea6-26fd-11df-bfd4-992fa37f6226