RequestBuilder: Handle Map and List contents as separate query params
website: Added query parameter map example
Merge pull request #377 from Turbo87/exploded-queries

RequestBuilder: Allow exploded query parameters
Properly name ignored exception in 'catch' block.
Generalize multiple param values to use Iterable.
Merge pull request #379 from square/jw/naming

Properly name ignored exception in 'catch' block.
Merge pull request #380 from square/jw/iterable

Generalize multiple param values to use Iterable.
client: Added url field to Response class
client: Reintroduced deprecated Response constructor
Merge pull request #383 from Turbo87/response-url

client: Added url field to Response class