Finally got the bar button stuff worked out
Fast SPoT: threads introduced. Bug: tag table does not get loaded when it first appears on screen
Fixed tags bug: getPhotoTags now in I/o thread
Sorted out refresh control: it turns out that ctrl-drag doesn't work
Bug found: image = nil when I try to set the zoom scale
Fixed zoomLevel bug: now called only once image is loaded. Fixed venturing of activity indicator (task 2). TV of photos is now sorted (task 6,7).
Writing to cache now works
Added makeRoomInCache method that deletes the least recently accessed file. Bug spotted: recentPhotos
Tinkering around with resourceValues. Doesn't work yet
makeRoomInCache now removes photos from cache until MAX_SIZE_CACHE_DIRECTORY is achieved
Fixed recentPhoto stuff: sorting is now done before performing the segue
task 5: discard imageData, etc. Hint 2 implemented to use original photo sizez
Increased cache size, fixed spinner bug: only start spinning when an imageURL is set