Authored by Olivier Poitrey

Add "How is SDWebImage better than X?" wiki link

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NOTE: The version 3.0 of SDWebImage isn't fully backward compatible with 1.0 and requires iOS 5.0
minimum. If you need iOS < 5.0 support, please use the last 2.0 version.
[How is SDWebImage better than X?](https://github.com/rs/SDWebImage/wiki/How-is-SDWebImage-better-than-X%3F)
Who Use It
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Future Enhancements
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- LRU memory cache cleanup instead of reset on memory warning
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- LRU memory cache cleanup instead of reset on memory warning
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