Pcap to Go generator README

Overview
========

This small utility takes pcap file and generates go code with byte slices containing packet data.

Example: Command
```bash
go run main.go -o gen.go -prefix somePackets -f /path/to/capture.pcap -package main
```

generates code in file `gen.go`:
```go
package main

//
// This file is generated automatically. DO NOT EDIT.
// Generated on 2020-05-01 18:26:04.419441164 +0500 +05 m=+0.006958750
//
import "time"
import "github.com/google/gopacket"

var somePackets = []struct {
	Data []byte
	gopacket.CaptureInfo
}{
	//
	// Frame 1
	{
		[]byte{
			//
			// Ethernet, off: 0, len: 14
			0xF8, 0x6E, 0xEE, 0x8B, 0xA4, 0x26, 0x8C, 0x90,
			0xD3, 0x1E, 0x65, 0x4C, 0x81, 0x00,
			//
			// Dot1Q, off: 14, len: 4
			0x02, 0x59, 0x08, 0x00,
			//
			// IPv4, off: 18, len: 20
			0x45, 0xC0, 0x00, 0xC2, 0x9D, 0x66, 0x00, 0x00,
			0x3D, 0x11, 0x09, 0x36, 0x2E, 0xE3, 0xBD, 0x01,
			0x2E, 0xE3, 0xBB, 0x07,
			//
			// UDP, off: 38, len: 8
			0x08, 0x4B, 0x08, 0x4B, 0x00, 0xAE, 0x00, 0x00,
			//
			// ... other layers
		},
		gopacket.CaptureInfo{
			// 2019-06-07T21:07:39.420703+05:00
			Timestamp:     time.Unix(1559923659, 420703000),
			CaptureLength: 95,
			Length:        95,
		},
	},
	//
	// Frame 2
	// ... other frames follow
}
```
You may then traverse resulting array, implement `gopacket.PacketDataSource` over it, etc.