v72: 40+ bug fixes.

v70:

Free voice messaging - hold down mic button to record, release to send.
Send multiple image messages at once.
Background sending - close the app and messages will still send.
Fast identity switching - swipe in the drawer from the left side to switch between identities.
Black theme (settings->global options).
Updated emoji.
Logout confirmation.
Removed default friend image icon.
Set notification LED color (may not work on all devices).