rename oxdna_pinyi to oxdna

mrdna/readers/__init__.py

@@ -47,5 +47,5 @@ def read_atomic_pdb(pdb_file, **model_parameters):
     return SegmentModelFromPdb(pdb_file)
 
 def read_oxdna(coordinate_file, topology_file, virt2nuc=None, **model_parameters):
-    from .segmentmodel_from_oxdna_pinyi import mrdna_model_from_oxdna
+    from .segmentmodel_from_oxdna import mrdna_model_from_oxdna
     return mrdna_model_from_oxdna(coordinate_file, topology_file,virt2nuc, **model_parameters)