Update GoogleMapsBusinessProvider.php

Original line:
`$query = sprintf('%s&client=%s', $query, $this->clientId);`
...fails!

client ID parameter should be supplied as `client_id` and not `client`. 

New line:

`$query = sprintf('%s&client_id=%s', $query, $this->clientId);`
Update GoogleMapsBusinessProviderTest.php

Replaced instance of client with client_id (line 31 & 50)
Add support for cities in Yandex Provider
Add setMaxResults method
Fix tests
Merge pull request #248 from Baachi/limit

Add limit/setMaxResults method
Add more doc. Fix #242
Fix tests due to data changes
Merge pull request #247 from Koc/yandex-cities

Add support for cities in Yandex Provider
Merge pull request #245 from userabuser/master

GoogleMapsBusinessProvider Client ID Fix
Update CONTRIBUTING.md
Prepare 2.0.0 release
Bump version to 2.0.1-dev
Replace zendframework with zend-http
Update real testcase
Merge pull request #250 from Baachi/patch-1

Replace zendframework with zend-http
Merge pull request #251 from Baachi/patch-2

Update real testcase
Fix tests
use pedestrian tag for street name if road tag is not available

add some spaces

use pedestrian tag for street name if road tag is not available
Fix tests