Feature request: pixel_format and movie_dtype shouldn't be overwritten by camera type params

[jonahpearl]

Current behavior: passing in, eg, --pixel-format uint8 doesn't do anything because in extract > util.py > detect_and_set_camera_parameters(), the args are overwritten by the camera settings because camera_type = "auto." To pass in custom params to pixel and movie formats, you also have to specify camera_type = either azure or kinect.

Expected behavior: a few options. I don't know the full extent of what camera_type is used for throughout the extraction, so take all this with a grain of salt.

1. [not preferred but easiest] instead of failing silently, when you pass in custom args for pixel_format and movie_dtype without changing camera type from auto, it should raise an exception and specify that you need to specify camera type.
2. [preferred] in between setting the default param dictionary and the line where it gets applied to the config (config_data.update(**default_parameters[detected])), update default_parameters to include any user specified stuff instead.

[jonahpearl]

And corollary: Feature request: let user specify camera types other than kinect azure and realsense