Hide the whole 'find me' box if autolocation is not available
Make area name easier to click - closes #504
Switch to using geo library from CDN
Use the same wording that Google use for the autolocate button on their maps sites.

closes #507
Add 'search by name' and tidy up controls. Closes #505
Use tap/click to centre map. Closes #506
Hide the controls at the start, show when placed on the map
Display error message on Opera Mini rather than presenting a map interface that is unusable. Closes #508