Mob 1532

@nandy-andy @RafLeszczynski @rogatty Please, review ;) DO NOT MERGE JUST YET
Yep, use `$.nirvana.sendRequest()`: [creating pin types example](https://github.com/Wikia/app/blob/MOB-1392-intmap-extension/extensions/wikia/WikiaInteractiveMaps/js/intMapCreateMapPinTypes.js#L203), [creating map exmaple](https://github.com/Wikia/app/blob/MOB-1392-intmap-extension/extensions/wikia/WikiaInteractiveMaps/js/intMapCreateMapPreview.js#L105), [getting tilesets example](https://github.com/Wikia/app/blob/MOB-1392-intmap-extension/extensions/wikia/WikiaInteractiveMaps/js/intMapCreateMapTileSet.js#L190).