Requests for the same resource are chained
Fix some typos and logic
Logically preloading is different then requesting at that moment in time
Synchronize access to af_imageRequestOperation
add relative priority to the different image request types
somehow this was nil at times
extend the operation tracking queue to be able to provide for multiple requesters
move this around so we'll get a lock on the op before we check the cache
fix typos
missed one
this needs to be scoped outside of the lock
indent correctly
we only care about the last image this particular image view requested
do some priority optimization
Merge pull request #2 from rdignard08/shoptap-branch-cut-from-1.3.3

Image Download Optimization - For Review