Replace any non alphanumerical or non-basic characters in content URIs.
Ensuring the Office and PDF Preview Processors are able to run on Windows.
Fixed up usage of environment variables in the PDF processor so it can run on Windows.
Preview processing should be disabled by default.
609 - Windows issues PR follow up
Merge branch 'windows-issues' of git://github.com/simong/Hilary into windows-issues
Spacing follow-up