Introduced base class for the bundles.

Created by: stefanoborini

Instead of delegating the need to define the traits interface to the plugin author, use a base class to define the @provides details and let the plugin developers just use the base class.

Fixes #36 (closed)

force_bdss/core_plugins/csv_extractor/csv_extractor/csv_extractor_bundle.py

-from traits.api import provides, HasStrictTraits, String
+from traits.api import String
 
-from force_bdss.api import bundle_id, IDataSourceBundle
+from force_bdss.api import bundle_id, BaseDataSourceBundle
 
 from .csv_extractor_model import CSVExtractorModel
 from .csv_extractor_data_source import CSVExtractorDataSource
 
 
-@provides(IDataSourceBundle)
-class CSVExtractorBundle(HasStrictTraits):
+class CSVExtractorBundle(BaseDataSourceBundle):
     id = String(bundle_id("enthought", "csv_extractor"))
 
+    name = String("CSV Extractor")
+
     def create_model(self, model_data=None):
         if model_data is None:
             model_data = {}