Added Signal handler to catch ^C and termintaion signals.
This will reset the data in the shred memory.

	modified:   PWM_Controller.c
Added call to signal handler setup
Added connection status to PWM_Test
Added select() sys call. System now uses only ~1% of CPU, before it used all available CPU time (100%)
Added JSON tags to specify how often Volt, Current and Temp data should be sent. Added return value check to daemon()