GUI Changes
- Add version to window title
- Automatically load a VPK when passed as the first argument to the program
- Update application logo
- Create installer application for Windows
- This registers VPKTool as the default application for opening VPKs
- Clean up a visual bug with the entry tree
- Fix VTF preview to allow displaying the highest quality mipmap
- Add button to close the open VPK
- Add a directory preview (shows contents of a directory in the content pane)
- Reword about text slightly