High-speed version of NGQP.  Still has some minor problems.
Minor problems in the high-speed NGQP fixed.
Add a high-speed bypass for the NGQP for the common case of a simply query
with quality constraints that outputs a single row.
Performance improvements for whereScan methods.
Simplification and performance tweak to the high-speed NGQP bypass.
First attempt to store costs and row counts as a logarithm.
Fix some minor issues with logarithmic cost in NGQP.
Fix test cases for the new EXPLAIN QUERY PLAN format.  Add the
wherecosttest tool.  Other fixes to logarithm cost.
Handle virtual tables correctly when using logarithmic costs.  Fixes
to test cases.
Fixes to EXPLAIN QUERY PLAN output.  Change weights back to something closer
to what they are in legacy.  More test case fixes.
Use a logarithmic rather than linear cost and row-count measures.
Do not report row count estimates in EQP output.