First commit: This is a test to make sure that I am able to get the mechanics of the pageviewer working, which I appear to have achieved. This enables the user to see all venues in the city in one list, or to swipe left and right to filter the venue list to see only those venues located in each of 8 different geographical regions. UI is not the finished article. Data is fed from temporary on-board list, and is purely for testing purposes (so it is inaccurate and incomplete). The next step is to develop the Firestore back end to hold the data and images.