DRAFT plumbing for contour drawing.
Draft contouring.
Merge branch 'master' into contours
Progress on iso contours, the classification passes simple tests.
Further progress on contouring...doesn't work yet.
Merge branch 'master' into contours
Working with multi-segment, saddle-free contours.
Adding sadle-test.

Cleanup other contour tests.
Saddle tests passing (I'm a little shaky on it still...but it seems to work).  DOES NOT work with contours on the edge.
DRAFT pad-aggregats.
Renamed test-apps directory.
Pad aggregates passes basic tests.
Fixed some mem-map issues around floats and chars.
Merge branch 'master' into contours
Fixed header-with-char issue in encode.
Merge branch 'master' into contours
Merge branch 'contours' of github.com:JosephCottam/AbstractRendering into contours
Infrastructure for multi-contour creation.
Merging padding with multi-contour infrastructure.
Converted ISOContours to interface.