initial fork

- added basic plugin functionality (for sensors only --> virtual sensor)
- added a more basic interceptor functionality for devices
- rewritten chart-module
- send pushover notifications additionality to eMails
- added cron-service for device-status

Bugs/Open:
- Translation
- Documentation for Plugins and Upgrade process
- plugin functionality for devices
- 'scene'-functionality for charts
- push from telldus?
- refactor telldus to act like a plugin