Store last write (UTC) ticks rather than date in order to minimize problems with whacko file systems
Add a whitelist of supported file extensions - it improves indexing performance
Add diagnostics for failed Placename lookups
Filter out 'SourceFile' prior to indexing the exif info in order to hide the full, local path
Force a re-index of a file if it has geo-location but the place name isn't set
Store the place name in the index
Fix a bug preventing full images from being returned (index path versus folder path issue)