[DO NOT MERGE] Added a better way to get the choices

closes #722 
@prabhasp For mali data imports, some, xform fieldnames and submission values names didn't match up because of difference in cases e.g . for #722  `{'DISTRICT': u'Bla', 'count': 1L}` VS.  `{u'label': {u'English': u'BLA', u'French': u'BLA'},  u'name': u'bla',  u'region': u'segou'}` and for #723 `CSRef` vs `CSREF`.
Also for #723, the submission value :- u'H\xf4pital' (Hôpital) would not match the field name 'Hospital'