Mapping of data block to match new schema

[nickevansuk]

As discussed the mapping of the data block to match the new Modelling Opportunity Data specification is below.

Where there is no comment on the line, assume the property value is a constant.

data: {
  "@context": [
    "https://www.openactive.io/ns/oa.jsonld",
    "https://www.openactive.io/ns-beta/oa.jsonld"
  ],
  "type": "Event",

  "identifier": "B26CLTG16001215", /* activityID */

  "name": "Teen Gym 1600", /* title */

  "description": "", /* description */

  "activity": "Gym Activities", /* activityGroup */

  "genderRestriction": "mixed", /* gender */

  "duration": "PT60M", /* activityDuration converted to ISO spec. Can do this with System.Xml.XmlConvert.ToString(TimeSpan.FromMinutes(activityDuration)) */
  "startDate": "2017-07-25T19:00:00Z", /* startDateTime */
  "endDate": "2017-07-25T20:00:00Z", /* endDateTime */

  "location": {
    "type": "SportsActivityLocation",
    "name": "Gym", /* comma separate onSiteLocation */ 
    "containedInPlace": {
      "type": "Place",
      "url": "http://www.fusion-lifestyle.com/centres/Braintree_Leisure_Centre/Contact#formTop", /* website */
      "name": "Braintree Sport & Health Club", /* siteName */
      "identifier": "B2BLC", /* siteID */
      "address": {
        "type": "PostalAddress",
        "postalCode": "CM7 1FF", /* postcode */
        "streetAddress": "Panfield Lane" /* address */
       },
      "telephone": "01376 552 585" /* telephone */
    }
  },

  "image": "https://www.gomammoth.co.uk/wp-content/uploads/venue-images/5-a-side-football/canada-water/gomammoth-5-a-side-football-canada-water.jpg", /* imageURL */

  "beta:level": "beginner", /* level */

  "beta:availability": "limited", /* availability */

  "offer": [
    { /* include if seniorAllowed */
        "name": "Senior non-member",
        "price": "7.00", /* seniorCost */
        "priceCurrency": "GDP",
        "type": "Offer"
    },
    { /* include if adultAllowed */
        "name": "Adult non-member",
        "price": "10.00", /* adultCost */
        "priceCurrency": "GDP",
        "type": "Offer"
    },
    { /* include if juniorAllowed */
        "name": "Junior non-member",
        "price": "5.00", /* juniorCost */
        "priceCurrency": "GDP",
        "type": "Offer"
    }
  ]

}