dcs1000w-0.54

1. A misplaced option on the ffmpeg command caused the
created movies to only contain one frame per minute
of the original captures.

2. Support for a user exit on an error retrieving images
has been added. The program
'/usr/local/bin/dcs1000w-error'
will be executed when an error is detected and logged if
it exists. A sample routine that uses X10 units to power
cycle the camera is included.