Develop seed fixes

Six fixes:
- tagging was broken
- uTorrent sets read only flags (in Windows, also in other OSes??)
- tryFloat returned 0 if the type is already a float, this set ratio to 0 in some cases
- Added a catch if move and symlink fails on the symlink part: copy back the file
- remove the move exception for torrents: the downloading will remove the files anyway so no need for CPS to remove them
- Fixed pause command for uTorrent and Transmission