Fix invalid source refresh tests (failing).
Fix validation of tilejson properties that were skipped by invalid vector_layers check.
Don't crash.
Reality is so complex.
Add (failing) tests for saving center with zoom outside of min/maxzoom range. Dedicated to ianv.
Adjust zoom for center to fit within min/maxzoom range.
Merge pull request #868 from mapbox/fix-center-minzoom-maxzoom-action

Fix center minzoom maxzoom action