Minor issues with transcode filter
Merge pull request #21 from al42and/transcode-plugin-compilation

Minor issues with transcode filter compilation. 
Thanks guys.
François's changes for improving indoor videos

Stabiliation filter fails to stabilize indoor videos.

List of changes for improvements:
 - Added considering frames with less than ten local motions as
   bad (vsMotionsToTransform)
 - Added a step that creates a derivative of the image
   (less vulnerability to exposure changes)
 - Show preprocessed frame (blur & derivative) when show=1
   (for easier analysis of the preprocessing)
 - Remove local motions based on average vector (and std.dev), with
   quality of local motions determining their influence on the avg.
 - When doing subimage matching (calcFieldTransPlanar), store the last
   five minimum error values to get an indication of the uniqueness
   of the match and use those as a basis for the match quality.
 - Addition to cameraPathGaussian that sets bad frame (extra == 1)
   transforms to a linear average between the previous good frame
   and the next good frame (This change has not been validated fully).

Code refactoring:
 - Refactoring of selectFields
 - Variable/class renaming
 - Comment additions and changes
Merge branch 'master' into indoor_vid