phpdoc
Cleaner handling of data streams when sending data to SMTP server
Remove RSS feed from IMP
Process data chunks in larger sizes
Remove basic.php script
Remove basic view menu-related code
Remove basic-only preferences
Remove basic view compose code
Remove basic view folders code
Remove basic view message code
Remove basic view mailbox code
Remove basic view basicsearch code
Remove basic template directory
More stuff to remove relating to basic view
Cleanup js directory by moving prefs-related scripts to subdir
Update package.xml
Move single use methods into the locations where they are used
phpdoc
Remove basic view help text
Remove basic view themes

There is a lot to cleanup in here, so this is not by any means complete