Added GromacsTopFile

wrappers/python/simtk/openmm/app/__init__.py

@@ -19,6 +19,7 @@ from amberprmtopfile import AmberPrmtopFile
 from amberinpcrdfile import AmberInpcrdFile
 from dcdfile import DCDFile
 from gromacsgrofile import GromacsGroFile
+from gromacstopfile import GromacsTopFile
 from dcdreporter import DCDReporter
 from modeller import Modeller
 from statedatareporter import StateDataReporter