added __all__
support to close the feature of delimiting identifier
support to close the feature of checking the operator
renamed aggregater
fixup! fbdd833
changed the order
added the first docs
rewrited mosql/mysql.py
added statement of doctest
added strip for op
refined the build_where
make it possible to hide prefix
updated the benchmarker
fixup! b5806ab
rewording
fixup! dac07d4
fixed that qualifier applys the f to raw in iterable
added doctests
changed util to util2