Rename README -> README.rst
Convert README to reStructuredText.
Add initial note for monitoring.
Enhance monitor_cli.py.

Added a command interpreter.

Can send json encoded packets for the following commands:
* list
* subscribe.
* unsubscribe.

Can still send raw ascii data to server using the 'raw' command. Data is
sent without any json encoding.
Print length of received data.

Also remove unneeded setting of WRITE flag on socket poller.
Add json command parsing to bfd-monitor.

Uses json-c library.

Implements a command pattern for handling commands received via json.
Remove 'list' command.

Decided that it is not needed.
Merge branch 'tr/monitoring'