moved scaling up the process
Merge pull request #380 from stylight/master

Fixed Podspec by including NS* files into source files
Merge pull request #379 from lavoy/master

Moved scaling to earlier in the process
Add prefix to GIF support category's methods
fix alpha pngs turning into white pngs when caching when you have a method that transforms the image but doesn't touch the pngs
Update README.md
Images can be downloaded in multiple threads.  Therefore the call to self.failedURLs containsObject:url must be synchronized to avoid a collection mutation error.
Merge pull request #388 from cfis/synchronize_failed_urls

Synchronize self.failedURLs
call progress block regardless of completion block, options
Merge pull request #389 from lavoy/master

Calls progress block regardless of completion block and options
Merge pull request #383 from garthex/white_png_issue

fix alpha pngs turning into white pngs
Fix some document error.
Fix a mismatch description.
Adjust indenting.
Format code in document.
Merge pull request #400 from BB9z/fix/document-parameter

Some document improves.
Update SDWebImageCompat.h

Undefine macros before define to prevent warning on iOS
Merge pull request #401 from docallag/master

Prevent warnings on iOS
Fix typo in download page URL
#406 - Fixed a problem where hitting a failed URL more than once wouldn't call the completion block