更新了 ReadMe

更新了 ReadMe
Implementing a cache using "FileOutputStream".
Creating "get" method to get the stream data saved in cache.
Adding example of using the file cache.
Adding example of using the file cache.
Merge pull request #9 from alexsilva/master

Implementing support Input / Output / Streams.
Merge pull request #4 from haoyuexing/master

更新了 ReadMe
Merge pull request #1 from yangfuhai/master

ok