New changes

Hi Tobias,

Too many changes to list them all :) 
- Added a couple of my files from other project - rpi_pin.*. I use MIT license, hope you are OK with it.
- Removed dependency on pthread and bcm2835 libraries - now everything is managed in main thread's loop polling for events
- Optimized RDS work, should transmitt radio text faster now
- Added 'status' command to print current configuration

If you have any questions we can discuss it over skype, just let me know.

Regards,
Andrey