[sqlalchemy] porting GeoAlchemy to 0.7

Hi i'm currently in the process of porting GeoAlchemy to SQLAlchemy 0.7. The first issue I'm having is related to before_create and after_create DDL listeners we have in GeoAlchemy. We use before_create and after_create listeners to prevent SQLA from adding the geometry column, and do

Re: [sqlalchemy] porting GeoAlchemy to 0.7

GeoAlchemy to SQLAlchemy 0.7. The first issue I'm having is related to before_create and after_create DDL listeners we have in GeoAlchemy. We use before_create and after_create listeners to prevent SQLA from adding the geometry column, and do it ourselves. Basically, the before_create