Squashed 'SinaStorageSDK/' content from commit ef392fa

git-subtree-dir: SinaStorageSDK
git-subtree-split: ef392faaedac5c91f5d6289e59cb181398507197
Merge commit '1c21a484bbaf43bf7b5522ee75c7a534299db64a' as 'SinaStorageSDK'