Release 4.0.3: Bug fix for TypeError in Telegram backend

After fixing this bug I realized that pull request #2 fixes
the same bug as well, although in a slightly different way:

#2

In case anyone is wondering: I'm only just now looking through this pull
request, not yet sure what to do with the rest of the suggested changes.

Release 4.0.2: Automatically create archive directory

Release 4.0.1: Bug fix for Hangouts back-end (AttributeError)

Initial release (and public commit)