v2.1.0

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