New UI changes for liveusb creation method
Add a LiveUSBCreator.dd_image method
Hook the gui up to the new destructive installation API
s/txt/rst for the README
Tweak the radio button label
Fire up the progress bar during the dd
Update the linux_dialog.py
Add a --dd command-line option
dd optimizations
Use dd oflag=direct
Add some tooltips
Require confirmation for destructive installs
Merge pull request #13 from lmacken/feature/destructive

Support "destructive" mode using dd