fix building without gnuTLS support
Python plugin: Add flag attributes to MessageInfo object
RSSyl: fix OPML import creating incorrect folder hierarchy
Python plugin: Make 'account' property of ComposeWindow read/write
Fix bug #3246 ‘attachment open: "remember this" ignored if ~/.mailcap does not exist’

Add also a warning if intermediate file cannot be created.
Improve translation (Debian bug #757929)
When changing focus in folderview, make sure the newly focused folder is visible first.
Don't differentiate the protocols used when using direct SSL/TLS versus STARTTLS

Patch by Alessandro Di Federico
add plugin to display QR-Code for avatar