Fix the VDBE_PROFILE logic.  Add a script to process the output file.
Avoid unnecessary calls to applyAffinity() during INSERT and UPDATE
operations, especially for table that have indices and tables for which
all columns have affinity "NONE".
Merge the VDBE_PROFILE fixes from trunk.
Add a test case for OP_SoftNull.
Add logic to do test coverage measurements on the VDBE code.