fixed minor tests issues
Minor changes in nose tests
Cherry pick from c86fb5a (max-depth option for dictizer)
Renamed internal methods for field serializers (same as in 41-unicode-serializers)
Merge remote-tracking branch 'smanousopoulos/master' into master
Minor fixes at INSPIRE XML tests
Reorganized code under schemata/types (see #45).
Merge branch 'master' into 34-dataset-unified-schema