In particular:
* set default value for accuracy to 15 (max)
* add zoomspeed for dynamic zoom (optzoom=2)
* make camera path optimization algorithm configurable
* update optzoom documenation in code to use new localmotions calculation function commandline arguments
* add debug option in vidstabtransform
Signed-off-by: Georg Martius <martius@mis.mpg.de>
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>