Ecoplug custom component update for Great Migration compatibility

[gbealmer (Glenn C Bealmer)]

Updated the repository for the new required folder structure and files.

gbealmer/pyecoplug

Also note the documentation change to configuration.yaml entry in order to detect status updates for manual on/off plug switching.

old

   switch:
   - platform: ecoplug

new

   switch:
   - platform: ecoplug
     scan_interval: 10