Update repository for openHAB fork of Eclipse SmartHome

[wborn]

• Because Eclipse SmartHome (ESH) continues as openHAB Core all references to ESH have been updated for this change:
  • File renames:
  • smarthome-grafana.js -> openhab-grafana.js
  • smarthome-grafana-user-defaults.js -> openhab-grafana-user-defaults.js
  • Code changes:
  • SmartHomeSubscriber -> OHSubscriber
  • SMARTHOME_GRAFANA_DEFAULTS -> OHG_DEFAULTS
• The project itself has also been renamed from smarthome-grafana to openhab-grafana
• The README.md has been updated to allow for easier code diffs by starting each sentence on a new line
• Since this is a major change the version is update from 0.1.0 to 1.0.0. The code before all these changes is available in the 0.1.0 release, see: https://github.com/wborn/openhab-grafana/releases/tag/0.1.0