First version of World Bank importer
Take requested indicators from configuration file
Change data model according to the updated diagram
Complete raw to data model parsing
Modify indicator parsing
Modify parser to adapt to last changes in the model
Conect with model2XML module
Work with external entities and model2xml. Fix bugs with constants
Fix date objects construction. Stop using dataset name
Adapt the importer to let the ids being generated within the entities. Fix some incoherences with object model
Update api_access.ini

Prepare the importer to track data from every available country, not only 10 (for fast test)
Update api_access.ini

Correct the source name
Adapt frequency specification in Dataset
Adapt to current model
Adapt generation of user and indicator objects
Add support to tendency in indicators
Add new required indicators
Refactor of WorldBank parser

Make it look a bit more like the others adding configuration properties
and separating functionality in different methods.

Now it validated countries against the CountryReconciler
Left the number of countries in 256
Add every avaliable language description for indicators

Fix some encoding problems noticed while doing it