This fixes the following bugs:
* traceback on decryption of OpenPGP-encrypted messages
* remote_control: use GED in send_chat_message
* gajim-0.15.3 can't connect to server without StartTLS support
* "make check" fails with complaining on src/command_system/mapping.py
* Account Wizard: Make text selectable
* Gajim crashes in connect.py
Overview and details:
https://trac.gajim.org/query?status=closed&milestone=0.15.4
Signed-off-by: aszlig <aszlig@redmoonstudios.org>