* Expand the abilities of the GetTextureData in replay drivers
to be able to resolve samples and render down to RGBA8 unorm
for file export to other programs.
* Greatly improve the ability to save textures - in theory any
texture format/type/dimension/etc should now be mappable in
sensible & useful ways to output formats.
* Also for float/unorm texture add an additional "resolved" option that
just does an unweighted average of all samples, which is the behaviour
from before (assuming that's what ResolveSubresource does).
* The explanation is in the FAQ but the short explanation is that most
data e.g. normal maps are conventionally displayed as if they contained
SRGB data, so RenderDoc does the same so things look as expected.
baldurk