Control debug output with a variable. Write to output window via a Stream.
Add '*'s to the assembly version so the version changes automatically.
Pull VSIX version out of the DLL rather than the manifest.

Should probably merge the two together, so that the version number comes
from the manifest and the build number comes from the DLL.
Change Runner so it doesn't need to be IDisposable.
Change docs slightly.
Tidy up README a bit.
Add TabSize environment variable.
Add DEBUG/RELEASE message on startup.
Add ToggleTrailingBackslashes example.
Remove VSIX with old-style versioning.
Add separate folder for the built VSIXs.

Stop them cluttering the place up...