fix requirements
add six to requirements
fix default value
fix tests
Add preprocessing before change obj
repair tests
cleaned code
fix IRC notify in travis
fix model with polymorphic_identity fixes #97
fix tests for py3
fix relation with uselist==False
return name of obj when delete action
fix return value when UPDATE or CREATE obj
fix test
add method with get column list from table
Add commit=True param to add action
make test for get_flat_columns
fix relation with multi pk in preprocessing
fix preprocessing pk for create action, when pk have not value
now can set pk from request