Add Turin City Open Licence IODLV2

This release adds the Turin city licence IODLV2.

Add context parameter to URLS

This release add an extra context parameter to the Fetcher URLS method enabling any fetcher to receive request scoped values required to index the data provider.

Add Client wrapper

Merge pull request #25 from thingful/url-param

change Fetch method 'url' parameter to string type