Make some initial changes for Linux port
Make config settings platform-agnostic
Add Linux-friendly handbrake priority handling
Remove unused msvcrt module
Make watchdog obey uTorrentEnable
Add a few comments for future improvements
Make path match logic case insensitive

In Windows this worked by default because the file system is case
insensitive.  This will matter in Linux, so fix it now.

Fixes Issue #3
Add file/dir permissions sanity checks