1.5.0:
- added accelerators (Return: Run | Ctrl+C: Clean History | Ctrl+Q: Quit | Ctrl+O: Open Filechooser | Ctrl+T: Run in Terminal | Ctrl+R: Run as Root)
- made the dialog much more compact
- removed an unused widget
- sort the history alphabetically before loading/saving it
- only run if the textentry is not empty
- added AUTHORS, README, INSTALL files
