v0.16.7

• (util.formatter) Added support for parsing img tags
  • By default, the alt or title attribute will be used as plaintext.
• (types) Added notifications object to power level content class.
• (bridge) Added utility methods for handling incoming knocks in MatrixHandler (thanks to @maltee1 in #103).
• (appservice) Updated IntentAPI to add the fi.mau.double_puppet_source to all state events sent with double puppeted intents (previously it was only added to non-state events).