mapping to base load run method signature
in-flight work to update MD loaders and transforms to use RawResult #49

* add indexes to models
* add loader for 2003 and more recent
* partial work on transforms
* store copy of old loader as load_copy2, which
  contains code that will need to be converted to
  transforms/validators
Merge branch 'rawresult' of github.com:openelections/core into rawresult