gitignore
card 26 -- API changes

* ::Connection is now a class to be instantiated with unique url
* e.g:

    @odk = OdkAggregate::Connection.new(url)
    submissions = @odk.submissions_where(Id: "123")

This allows for different instances of OdkAggregate to connect to
different places.
Merge pull request #1 from func-i/feature/26-url

Feature/26 url