appends confidence in tuple for where conditions
Revert "take with confidence out of whereclause"

This reverts commit 34c4bad73f96626d886cebbd9e43a5299d4830fb.
trying to reset
undo accidental merge with branch where_confidence
first pass at swapping to new whereclause grammar - where similarity to col = val > .4 definitely still broken
probably fixed where similarity to col = val > .4 parsing
test where col = val
made column_names caseless
Add ability to set kernel in analyze. Use '... WITH MH KERNEL'
Merge branch 'master' of https://github.com/mit-probabilistic-computing-project/BayesDB into pyparsing
fixed test bug
fixed again
Merge branch 'master' of https://github.com/mit-probabilistic-computing-project/BayesDB into merge_to_where
Merge branch 'pyparsing' of https://github.com/mit-probabilistic-computing-project/BayesDB into merge_to_where