forgot commit this: changed the version
added new data.sql
fixed typo
the on clause in join actullay is a condition
better naming
added the draft of Query class
added a developing test
added code to detect py3 and close #3. thanks @grapherd
better naming maybe
refined the Query class
updated test_util.py
added docs
fixed previous commit
moved preprocessor to statement
added possibles stuff
added default stuff
the statement now uses the default and possibles
using alias is just ok
make it simpler
added versionadded and versionchanged