vspipe: Include cstdio to make clang happy
vspipe: End every error message with \n
Merge pull request #21 from dubhater/vspipe-stuff

Dubhater's vspipe fixes
vdecimate: Replace tabs with 4 spaces
vdecimate: Add partial support for override files

Supports:
   12345 -
Does not support:
   12345,54133 +++-+

vdecimate doesn't care about hybrid content, so the concept of video and
film regions doesn't apply.

The ovr parsing code was stolen from fieldhint.