Remove dead code and Qt update available dialog
add base64 decode function
Merge branch 'master' of github.com:rstudio/rstudio
Quit in preparation for update download
3632: implement copyImageToClipboard gwt callback
Use window-modal sheets for file dialogs and alerts
First part of data URI download handler

The actual base64Decode is not currently working for unknown reasons
Initial implementation of web-based About dialog

Remaining work:
- Add app icon, refine visuals
- Add user agent information
- Make about dialog available on the web
- Better dialog size & positioning (?)
Implement base64 decoding

I tried the SecDecodeTransform but the results always came back
with 0 bytes. It was easier to just implement it.

Right now failure is totally silent, ideally if the base64 data is invalid
we would alert, and do so without prompting for a filename.
retina icons for secondary browser window
revise webkit version check message
ensure that about dialog is always centered
add user agent to about dialog
correct fix for about dialog centering
add about dialog to server mode
eliminate eclipse warnings
reduce visible lines in about box so it's more likely to fit on small screens
Open AGPL link in a new tab on the web client
add about dialog caption
add rstudio log to about dialog