Depend on GeoAlchemy 2
Use geoalchemy2 in xsd
Use geoalchemy2 in geo_interface
Use geoalchemy2 in protocol
Use geoalchemy2 in test_renderers
Use geoalchemy2 in test_geo_interface
Use geoalchemy2 in test_protocol
Fix geo_interface test
Change version to 2.0dev1
Update CHANGES.rst
Set versions to 2.0dev1 in conf.py
Merge pull request #25 from elemoine/geoa2

Use GeoAlchemy 2 and bump version to 2.0