Allows browsing and setting of local files; however, doesn't upload them.
Added docstrings to modified files
Implemented case for when downloading gravatar images won't save as jpg.
Changed some sizes around on the picture panel to allow 90% of the webcam

Not well tested (Windows, Sun's JDK, invalid files): merge at your own risk.
Merged in Nick's browse for image changes and made some enhancements here and there.