TRAC #14744
Issue=51/52
Delegated format queries to RenderbufferStorage.
Eliminated TextureColorbufferProxy by merging it into Colorbuffer.
Abstracted texture colorbuffer queries.
Moved some conversion functions to the right namespace.
Fixed line-endings in Texture.cpp
Signed-off-by: Daniel Koch

Author:    Nicolas Capens <nicolas@transgaming.com>

git-svn-id: https://angleproject.googlecode.com/svn/trunk@553 736b8ea6-26fd-11df-bfd4-992fa37f6226