Add PyQt 5 GUI for PC

- Update Windows' Python to 3.3.3 x86 official
- Update MinGW prefix for Arch Linux's mingw-w64
- UPX compress all binaries and libraries
  - LZMA compression seems to work best
- Download custom compiled PyQt 5 for Windows
- Create launchers for Windows and Linux
  - Allows for exe icons without sacrificing editability of Python
    scripts
  - Allows the console window to be hidden on Windows
  - Allows for double-click-to-open for the GUI on Linux
    (provided that dependencies are installed)
  - Probably still need to handle i18n paths though
  - Include manifest in PE resources to avoid unnecessary UAC prompt on
    Windows
- Remove exit.py: let patcher.py clean up its own crap
- Allow querying the available auto-patchers for the GUI
- Remove duplicate fileinfo.loki variable instantiation line in
  fileinfo.py
- Allow querying the available patchinfo scripts for the GUI
- GUI has, over the CLI patcher, the advantage of being able to
  customize the auto-patcher for unsupported files