Remove printf for image size
Add error for zero frame length
Add error for failing to lock the buffer
Removed printf's and used symbolic return values for savepic function
Add LED for image read/write
Updates to version and imgsize commands
Use symbolic names for imager commands
Added debug message on taking a picture
Change severity of errors from critical to error
Move time delay into sensor_on function
UCA1_init_UART is not needed as it is called by Adafruit_VC0706