Add d3d8 scnapshot. Be consistent with swapeffect.
Add more README documentation on how existing test drivers are structured. More than once, I've reverse-engineered how the test suite uses test drivers (app_driver.py and tool_driver.py) to invoke scripts within the apps/ and traces/ directory. In order to save my future-self some work in doing this yet again, I've written some documentation in README.markdown in each directory. Hopefully this documentation will be useful for anyone wanting to write additional tests.
Drop pragmas.
Add a d3d10 level 9 test case.