Have LineRenderer extend AreaRenderer

By default, AreaRenderer's stroke color is set to "none", and LineRenderer's
fill color is set to "none".

Close #501.
Close #506.
Merge pull request #507 from palantir/area-line-renderer

Have LineRenderer extend AreaRenderer
Release version 0.14.2
Fix compiler pointers
Fix Utils references
Merge in changes
Fixed merge in