buildbot: remove unnecessary build steps (cg and pdb purging)
buildbot: run unittests on windows
Merge pull request #12 from shuffle2/buildbot-msvc

Buildbot windows updates
Update storesymbols.bat to match what is actually being used.
Merge pull request #13 from shuffle2/buildbot-msvc

Update storesymbols.bat to match what is actually being used.