Merge commit 'origin/master' into gallium-0.2

Conflicts:
	docs/install.html
	docs/relnotes-7.3.html
	src/mesa/shader/slang/slang_codegen.c
	src/mesa/shader/slang/slang_compile.c
	src/mesa/shader/slang/slang_emit.c
	src/mesa/shader/slang/slang_preprocess.c
	src/mesa/shader/slang/slang_preprocess.h