常用经典哈希函数Go语言实现，提供uint32及uint64类型的哈希函数。

使用方式：

import "github.com/gogf/gf/encoding/ghash"

接口文档：

https://godoc.org/github.com/gogf/gf/encoding/ghash

基准测试：

goos: linux
goarch: amd64
pkg: github.com/gogf/gf/encoding/ghash
BenchmarkBKDRHash-4         50000000            30.2 ns/op
BenchmarkBKDRHash64-4       50000000            27.2 ns/op
BenchmarkSDBMHash-4         30000000            40.5 ns/op
BenchmarkSDBMHash64-4       50000000            43.1 ns/op
BenchmarkRSHash-4           30000000            37.8 ns/op
BenchmarkSRSHash64-4        50000000            33.5 ns/op
BenchmarkJSHash-4           50000000            37.1 ns/op
BenchmarkJSHash64-4         30000000            38.2 ns/op
BenchmarkPJWHash-4          50000000            33.7 ns/op
BenchmarkPJWHash64-4        50000000            33.8 ns/op
BenchmarkELFHash-4          50000000            35.8 ns/op
BenchmarkELFHash64-4        50000000            32.4 ns/op
BenchmarkDJBHash-4          50000000            26.9 ns/op
BenchmarkDJBHash64-4        50000000            26.8 ns/op
BenchmarkAPHash-4           30000000            49.1 ns/op
BenchmarkAPHash64-4         30000000            49.8 ns/op