fix duplicate symbols when using with webp via pods
Updated all block params and properties, using defined blocks that have var names (for proper autocomplete). Created a  SDWebImageNoParamsBlock to distinguish easier from other no params blocks. Fixes #810
guarding against image source == NULL
Merge pull request #819 from n13/master

guarding against image source == NULL
Added test for the UIImage+MultiFormat crash
Fixed SDWebImageCombinedOperation cancel crash (#798 #809)
Merge pull request #795 from xlchen/master

fix duplicate symbols when using with webp via pods
Missing mark.
Merge pull request #827 from BB9z/fix/pargma-mark

Missing mark.
Temporary fix for #809, until we can figure out the cause of the crash
Bumped podspec version
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