Make new lines fragment showing each line on the map, use MQTT positions

Summary:
Raise min sdk version to lollipop and update dependencies

Use single class for live position updates, use new viewmodel

Tweak map visuals

Simplify code

Update dependencies, upgrade kotlin, change library for MQTT. Also, try to fix animation.

Show buses in the line detail fragment

Change color of bus marker, draw border of marker in black

Reach perfect layout for BusInfoWindow, with and without close icon

Fix bugs

Sanitize directions (attempt)

Switch between list of stops and map

Reviewers: valerio.bozzolan

Reviewed By: valerio.bozzolan

Subscribers: valerio.bozzolan, Libre BusTO

Tags: Libre BusTO

Differential Revision: https://gitpull.it/D126