1) Rrerequisite:
   snappy should be installed first

2) Install:
   cd gosnappy   
   make install

   usage:
   import  "lihui/gosnappy"  
 
3) API Description

    a) IO style--the same as standard package "compress"
       
       gosnappy.NewReader(r io.Reader)(r io.Reader, err os.Error)
       gosnappy.NewWriter(w io.Writer)(w io.WriteCloser,err os.Error)
          
           user must call w.Close() at the end of write. 
           w.Close does not close the underlined writer           
       
    b) Byte array  style-- the same as original snappy lib
     
       gosnappy.Compress(output []byte,input []byte)[]byte
       gosnappy.Decompress(output []byte,input []byte)(result []byte,err os.Error) 

       we could pass nil or small byte array to 'output' parameter of these functions, 
       if the capacity of output less than the result size , function will
       automaticly malloc new byte array which is large enough. 
       
       therefor the 'result' object returned may be not the same as 'output'
       object