Attempt a fix for the overlap removal problems by adding functionality for consolidating duplicate and near-duplicate intersections.
Fix a few bad accesses in the new spline overlap code.
Fix mlist t-value mismatch for adjacent segments.
Allow for an easy reduction in verbosity.
Disable verbose spline overlap output in preparation for merging.
Merge pull request #1485 from fontforge/overlap_exploration_2

Overlap removal improvements.