Dust props to anim framework and cleanup
Lines props to anim framework and cleanup
Greyscale cleanup
Luma cleanup
Mirror cleanup
Imageconvert cleanup
Tcolor pros to anim framework and cleanup
Mono cleanup
Watermark cleanup
Oldfilm to anim props framework and cleanup
Fix cbrts build on Windows.
Merge pull request #45 from jliljebl/anim-props-fix-batch-3

Anim props fix batch 3
Audioconvert cleanup
Audiowave cleanup
Region cleanup
filter_transition cleanup
Vignette cleanup
Add mlt_util API with mlt_util_from_utf8().

This will be used for converting a text encoding from a standard MLT
internal string encoding of UTF-8 into other encodings - on Windows only
initially.
Fix opening file in avformat with extended characters on Windows.
Fix build regression in previous commit.