Add isbnlib dependency to MSI builder script
Always run windows service in processor mode
Add 'is_os' utility method for operating system identification
Make logfile default path platform-independent
Setup logging in a dedicated function to avoid code duplication across
platforms
autorotate: Skip page if already previously rotated
Add 'get_subprocess' utility function

Automatically passes parameters on Windows that prevent the opening of a
cmd.exe shell.
pdfbeads: Fix various issues on Windows platforms
scantailor: Various fixes for issues on Windows platforms
tesseract: Use 'get_subprocess' to obtain process
web: Faster scaling on Windows platforms

This was done by switching from 'resize' to wand's 'sample' method,
which while being slightly less aesthetically pleasing, is a lot faster.
web: Fix plugin selection widget
web: Fix up submission form to use new config widgets
web: Fix bad page count calculation in pagination component