Include full purchase_url URL in GBFS station_information and free_bi…

…ke_status

* Based on #25 (comment).

gbfs.md

@@ -189,6 +189,7 @@ stations          | Yes       | Array that contains one object per station in th
 - post_code       | Optional  | Postal code where station is located
 - rental_methods  | Optional  | Array of enumerables containing the payment methods accepted at this station. <br />Current valid values (in CAPS) are:<br /><ul><li>KEY _(i.e. operator issued bike key / fob / card)_</li> <li>CREDITCARD</li> <li>PAYPASS</li> <li>APPLEPAY</li> <li>APPLEPAY</li> <li>ANDROIDPAY</li> <li>TRANSITCARD</li> <li>ACCOUNTNUMBER</li> <li>PHONE</li> </ul> This list is intended to be as comprehensive at the time of publication as possible but is subject to change, as defined in [File Requirements](#file-requirements) above
 - capacity        | Optional  | Number of total docking points installed at this station, both available and unavailable
+- purchase_url    | Optional  | A fully qualified and encoded URL where a user can rent a bike at this station_id.  This URL should be a deep link specific to this station_id, and should not be a general rental page that includes information for more than one station.
 
 ### station_status.json
 
@@ -204,7 +205,6 @@ stations              | Yes       | Array that contains one object per station i
 - is_renting          | Yes       | 1/0 boolean - is the station currently renting bikes (even if the station is empty, if it is set to allow rentals this value should be 1)
 - is_returning        | Yes       | 1/0 boolean - is the station accepting bike returns (if a station is full but would allow a return if it was not full then this value should be 1)
 - last_reported       | Yes       | Timestamp of the last time this station reported its status to the backend
-- purchase_url        | Optional  | A fully qualified URL, to which the station_id can be passed as a parameter, where a user can rent a bike at this station_id.  For example, if a fully qualified URL to a rental webpage for this station is http://app.socialbicycles.com/map?station_id=1219, then the value of purchase_url would be http://app.socialbicycles.com/map, and station_id would be 1219.
 
 ### free_bike_status.json
 Describes bikes that are not at a station and are not currently in the middle of an active ride.
@@ -217,7 +217,7 @@ bikes             | Yes       | Array that contains one object per bike that is
 - lon             | Yes       | Longitude of the bike. The field value must be a valid WGS 84 latitude. See: http://en.wikipedia.org/wiki/World_Geodetic_System
 - is_reserved     | Yes       | 1/0 value - is the bike currently reserved for someone else
 - is_disabled     | Yes       | 1/0 value - is the bike currently disabled (broken)
-- purchase_url    | Optional  | A fully qualified URL, to which the bike_id can be passed as a parameter, where a user can rent this bike_id.  For example, if a fully qualified URL to a rental webpage for this bike is http://app.socialbicycles.com/map?bike_id=3503, then the value of purchase_url would be http://app.socialbicycles.com/map, and bike_id would be 3503.
+- purchase_url    | Optional  | A fully qualified and encoded URL where a user can rent this bike_id.  This URL should be a deep link specific to this bike_id, and should not be a general rental page that includes information for more than one bike.
 
 ### system_hours.json
 Describes the system hours of operation. A JSON array of hours defined as follows: