ENH: add new computation module and toplevel eval function
ENH/TST: add new instance testing functions and their tests
BUG: prevent certain index types from joining with DatetimeIndex
CLN: remove engine detection and manip for datetimes
DOC: add docstring to eval
ENH: rewrite assignment as equal comparison
ENH: add Expr based terms for pytables
ENH: allow multiple warnings to be checked in assert_produces_warning
ENH: handle Indexes in alignment
ENH: add automatic query via frame.__getitem__
DOC: add API docs
DOC: add query docstring
DOC: use float index for now in query docs
PERF: add start of vbench for eval
ENH: add boolean operators
ENH: add chained comparisons
BUG: provide scope updating avoiding need to pass local_dict/globals_dict explicity
     to query/frame.__getitem__/eval
DOC: beef up eval and query docs
BUG: make sure that new bool ops do not get in the way of column error reporting
TST: add commented failing syntaxerror test