Conversion to Windows

-Completely removed Linux support in exchange for Windows.
-Updated default locations of the output directory and temporary
directory to locations that make sense in Windows (see README).
-Changed most file paths to use backslashes to prevent issues with cmd
calls in Windows.
-Corrected a bug present that was present in the Linux version where
spaces in a folder name were causing the program to crash.
-Edited out the second mkvmerge that attempts to fix subs as the issue
appears to have resolved in mkvmerge as of May 2014.