added more gphoto status codes
now doesn't crash if verbose mode is enabled and camera is not connected
shorter cycle time between LEDs
now prints the response from the serial port in debug info
preview capture now works on a mac - uses platform to choose which shell call to use
now timestamps log lines to enable debugging of timing issues
now releases at the end of an rti capture sequence
now releases the camera after a preview capture
added a smattering of camera releases which fix issues with the D800
Merge pull request #3 from pjb304/phils-hacks

Phils hacks