Add scheduler functions for the modes. Add database classes.

- Add scheduler functions for the Pause and Panic modes.
- Add the database functions for the Nest
Nests are working.

- Add the concept of nest manager
- Change files to support nests
Add some exceptions and support for nest work
Add linux nest conf and linux nest code
Add ssh connections

- Add nests ip, username and password in the conf file and the database
- Add ssh connection to each nest
- Add command execution to each nest
- Everything is controled by the NestManager
- You can have as many Nests as you want