Finishing restructuring on the way to HACS and some bugfixes/improvements

As the integration is ready to be supported by HACS and because ALL user data get lost upon updates via HACS, I decided to create a separate folder called 'resources/bwalarm/' in the HA config folder and place there configuration file for this integration (now bwalarm.yaml) and some used resources (for example, some new badges in bwalarm/images/ folder).
Because of that you need to move and rename your alarm.yaml and also change !include statement in configuration.yaml.

The manual installations and upgrade process is described in Readme.md

Some other changes to mention:

fixes #16, #12 and #21
it is now possible to enable/disable MQTT without restart (beta change, WIP)
there is no more different versions of component and panel - it's now the same as GitHub release tag
persistence file now exists only in pending states
persistence and log filenames have changed: alarm.json -> bwalarm.json, alarm_log.json -> bwalarm_log.json
in addition to binary_sensors and switches sensors are now also part of the list to choose from in Settings -> Sensor
activity log in panel does not show badge/user name when message is "disarm attempt failed" etc
if the integration fails to start, a better error message (with relevant parts of HA log) is generated
Update user dialog now shows correct badge and updates it as you type
As always, make a backup of your files before upgrading and do not hesitate to open a new issue if something is going not quite right.