Add missing megolm algorithm field that was causing
the "unknown algorithm" error.

Ignore devices that fail the verification.

fixes #345

Otherwise after a restart the old account will be loaded and we
won't be able to decrypt messages from devices using the new one-time keys.

Also new one-time key upload requests will fail due to conflicts with
the existing keys with the same keyid.

- Run the linter
- Explicitly use cmake for installing olm

- Patch the olm repo with a CMakeLists.txt file

Add more logging during message sending

fixes #212

Remove empty space between username & timeline widgets

fixes #330

fixes #193

fixes #235

- Join rules
- Guest access