v1.3.0-docs1

v1.3.0-docs1

• Release date: 2017-05-05. Live on prod 2017-05-??.
• Requires: tileserver v2.0.0 and tilequeue v1.7.0 and mapbox-vector-tile v1.2.0.

• [docs] Delete api-keys-and-rate-limits.md page
• [docs] Update attribution.md page with less Mapzen
• [docs] Add your_mapzen_api_key URL query strings to URL endpoint examples
• [changelog] Update mapbox-vector-tile pypi urls
• [tests] island > islet for OSM data change