* Rename README to ReadMe.txt
* Document that nasm 2.03 or newer is required for building VTF0
Signed-off-by: ydong10
Reviewed-by: jljusten
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12384 6f19259b-4bc3-4df7-8a09-765794883524