Census intial checkin
Working...
Added Comparator support to RLE.  Closes #21.
Pointed at new data location.
Merge branch 'Census' of github.com:JosephCottam/AbstractRendering into Census
Modified Census for just image output.
Documentation updates.
Infrastructure for VarChar and min/max headers in hbin files.
Fast-bounds passes simple tests.
Moved most 'ideas' into issues.
Added max/min header info to hbin.  Closes #15.  Also reserved 'v' for varchar and added related segment support to the header.
More encodings...
Merge branch 'master' into Census
Updated for new hbin format and rendering architecture.
Updated utilities.
Census data in preset.
Merge against master
Adding many census-support utilities.

Fixed extra re-calc of aggregates in presets.
Fixed specialization vs transfer caching error.
Documentation.