improve exception message when message type does not match (fix #21)
update tests to changes in generator in f42fa96e243cdfa4b42a25df79e41f4e59fcd327
python 3 compatibility
Fix python executable on Windows.
Merge pull request #22 from dirk-thomas/hydro-devel

python 3 compatibility
Merge pull request #23 from AurelienBallier/hydro-devel

Fix python executable on Windows.
update changelog
"0.4.15"