Added functionality for reading in the modlist.txt file generated and
used by Mod Organizer and creating a list of mods from it.  Added
support for writing a list of mods to a sorter XML file.  Combined these
two functionalities to add support for generating a sorter XML file from
a modlist.txt file or updating an existing sorter XML file's mod's
enabled status from a modlist.txt.  Added more controls to the form to
allow for the user to use these new features (the system is still pretty
rigid but it works).  Added a comparator implementation for sorting mods
alphabetically by name.  Also, all files should hopefully be closed
properly now.