Do path resolution before import processing and style inlining

Excluded imports did not have the information to modify their paths correctly,
leading to duplication in path.

This also reduces the the complexity of path resolution for style inlining, so a
win all around.

Fixes #27
Treat config file as "defaults", commandline flags override

Now any option can be in the config, fixes excludes block in grunt-vulcanize not
being used unless it was in the config file.

Bump version