basic data retrieval using Guzzle
* deserializing it with the JMS handy deserializer
* added basic unit test as a starting point
added `DataPoint` entity
added `DataPoint` entity
added getters for `DataPoint` info
added `DataBlock` model and the `minutely` attribute of the response
added `hourly` and `daily` attributes of the response
updated annotations; added test assertions
Merge pull request #1 from lolaent/data-model

Partial data model