windows-build-deps.cmd: do not skip protobuf with non-vc9 compiler.
VSConfig.cmd. default to VS2008 if generator is not passed as a command-line argument. This should prevent windows-build-*.cmd failing.
Merge remote-tracking branch 'remotes/origin/VS2010-clean' into NoBoostVS2010

Conflicts:
	tools/VSConfig.cmd
Properly check that we're actually running windows-build-deps.cmd from the Visual Studio Command Prompt.
Merge remote-tracking branch 'remotes/origin/VS2010-clean' into NoBoostVS2010
Small cleanup + add note that Qt 4.8.4 should support VS2010 out-of-the-box.