- unify naming of all header files. Obviously, this is a breaking change that affects all users.

- unify naming of all header files. Obviously, this is a breaking change that affects all users.

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@1150 67173fc5-114c-0410-ac8e-9d2fd5bffc1f