early tests with a transform generator
modified the interface to the generator
Merge branch 'master' of github.com:JosephCottam/AbstractRendering
Merge branch 'spark'
major rework on fast_project for a better iterated async version
Modified python build instructinos.
Removed valueType from glyphset.
More documentation; Removed vestigial valueType entries; Fixed RLE/Avro interchange issues.
 More tests.
Updated readme.
Updated readme.
Modified for (automatic) conditional spark-inclusion.
Making fast_project play with PYTHONPATH (per Jeff Baumes)
Reduced compile-time warnings (mostly related to generic types).
Removed type safety warnings (or added annotations to the ones that can't be removed)
Updated readme for Spark changes.
Added subset support to demo app.
Merge branch 'master' of github.com:JosephCottam/AbstractRendering
Quadtree does segment proplerly.  Closes #2
Merge branch 'master' of github.com:JosephCottam/AbstractRendering