Update code and modules because of module changes

[mmattel]

This PR does the following:

• Updates the code to allow the new paho-mqtt client v2 which had breaking changes.
  Note that the code is still working if one is using the old version (1.6.x)
• Add code to make the homeassistant status name configurable.
  Supersedes subscribe to homeassistant/status and not hass/status (default values) #168
  No breaking change, if the value is not in the config, the old default (hass) is used
• Add the ability to configure TLS for MQTT
  Supersedes subscribe to homeassistant/status and not hass/status (default values) #168
  No breaking change if TLS is not defined in the config
• Add a tls-files directory including a .gitignore file excluding all files from git sync
  This eases adding TLS certificates into a directory that are excluded from repo updates.
• Updated the requirements.txt file removing module versions + adding one module
  This module is needed to identify a modules version (needed for paho-mqtt).
  • I am running all modules with the latest module release available without any issues.
    Though keeping the version for rpi_bad_power.
• Update the README accordingly

The code runs flawless on my system (as usual 😄 )

Note, if you merge this, you maybe want to make a new release so that the changes get recognized more easily.

[Sennevds]

Hi looks good but you have some conflicts if you can fix these I will merge the branch

[mmattel]

Conflicts solved. Funnily they were only in the repo but not local. Anyways clean now 😄