FLOE-206

Extended the PouchDB datasource to be able to add and handle views in the database for enhanced queries. Also updated to the latest version of PouchDB.

http://issues.fluidproject.org/browse/FLOE-206
You have a unit test for get() with "get" method. Shall we add another one to get() with "query" method so that we have an example of the case to use "query"?