Pyscada

- added missing migration file

- fixed double connect in visa device
- moved loading animation in hmi
- added 100 ms and 500 ms polling interval (experimental)
- added extension compatibility
- fixed onewire and smbus reinit handler
- added protocol id for the new GPIO Extension

- fixed "-" bug in view link_title
- fixed visa daq restart handler
- fixed hmi "AutoUpdateButton" not working
- updated docs, updated readme
- added utils.blow_up function to convert database data from change of value to constant timestep data

- updated Docs
- updated systemd unit file
- improved HMI

- major update to the javascript part of the HMI Client
- added time selection bar in HMI

- fixed Jofra350 Admin
- fixed OperationalError in scheduler