Orphan re-queue and delete failed when path contains non-plain ASCII characters.

Convert UTF-8 name coming from CherryPy to a platform compatible name.
Improve handling of orphaned jobs.

Re-queue of a set without a nzb.gz file would not recognize par2 sets.
Convert "None" strings in the attrib file to None.
OSX: update unrar to version 4.20
Catch a renaming bug in par2-tbb and retry with par2-classic.
Update unrar for Windows to 4.20
Don't use SFV check when more par2 files can still be downloaded.
Generic sort didn't always rename media files in multi-part jobs properly.

`rename_similar()` should be called outside of the media rename loop.
`rar_extract_core` should always return full paths.
Remove placeholder for Cleanup filter in Config->General. Confusing for users.
Add 'B' to server amounts.
Add optional web-watchdog to the watchdog.
Remove all visible features for newzbin.
Prevent crash when nzbxxx.com's category cannot be determined.
When re-evaluating RSS feed, the original sort order was not preserved.

When re-using RSS entries from memory, use the original feed order and not
Python's random dictionary order.
Add schedule: when schedule has no days, assume daily instead of ignoring.
Add 'B' to download totals on main page.
Update POT file.
Filter unusable folders from lists generated by pathbrowser.
Update translations
OSX:  remove association with "rar" and "zip" files.
Remove "Indexers" page from all skins.