Rrerequisite: snappy should be installed first

Install: cd gosnappy
make install

usage: import "lihui/gosnappy"

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