More robust command console history saving
Add helper function for executing dns-srv requests
Implement slurpFileAsync() for asynchronous file/urls retrievals
Add new interface for dom traversal (for easier replacing on E4X)
Remove E4X from styles.js
Add support for avatars stored as PHOTO/EXTVAL in vcards
Add switch for tabber/not-tabbed in prefs pane
Add view history button in chatpane
Use icon roster by default