This information is useful, but in cases when you, say,
working on a bundler it's annoying to scroll all the
information up.
Now behavior would be:
- running `./blender --debug-libmv` will print all the
debug messages
- running `./blender --debug-libmv --verbose 0` will
print only debug messages from solvers, recosntruction
and so, but will bypass final reprojection bunch of
messages
- running `./blender --debug-lib,v --verbose 1` will
include final reprojection messages.
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