Fixed documentation spelling.
Merge branch 'branch-misspell'
Merge pull request #829 from davemess/master

Fix documentation spelling
Fixed other misspells from appledoc (additions to #829)
Add Dependency Badge
Add References Badge to Readme
Merge pull request #836 from reiz/master

Add Reference & Dependency Badges
fix cancelAll crash
Flag to transform animated images

Using a new SDWebImageOptions flag: SDWebImageTransformAnimatedImage
Merge pull request #703 from talklittle/master

Flag to transform animated images
Merge pull request #838 from justjimmy/master

fix cancelAll crash (Issue #809)
Updated libwebp reference to 0.4.1 (this fixed the arm64 build issues)
Fix misnamed parameters in comment documentation
Merge pull request #850 from tonyarnold/fix-comment-documentation

Fix misnamed parameters in comment documentation
Updated references to libwebp files after the changes from their latest release (0.4.1)
More explicit error message in case of nil completedBlock

NSParameterAssert doesn't provide enough information for understanding the API misuse.
Pointing the API user to SDWebImagePrefetcher makes more sense, as a nil completedBlock most likely signifies the intention of prefetching the image.
Merge pull request #854 from Gabro/patch-1

More explicit error message in case of nil completedBlock
Updated README.md with CocoaDocs link
Adding a flag for Cocoa Pods users

Using the Parse framework and SDWebImage frameworks installed via Cocoa Pods gives the same error as described in the Alternatively section of the Add Linker Flag section in this Readme.
I found a solution here : http://www.deanmao.com/2012/12/31/linker-error-using-cocoapods/
Merge pull request #879 from dulgan/patch-1

Adding a flag for Cocoa Pods users