Add command line flags as another object in JSON output

[codingo]

50 resolves #15 however this output doesn't let you know the command line flags / header information used for the scan like output normal does.

Output normal uses the following code from output helper to do this:

    def generate_header(self):
        output = "VHostScanner Log: {} {}\n".format(time.strftime("%d/%m/%Y"), time.strftime("%H:%M:%S"))
        output += "\tTarget: {}\n\tBase Host: {}\n\tPort: {}".format(self.scanner.target, self.scanner.base_host, self.scanner.port)
        output += "\n\tReal Port {}\n\tIgnore HTTP Codes: {}".format(self.scanner.real_port,self.scanner.ignore_http_codes)
        output += "\n\tIgnore Content Length: {}\n\tWordlist: {}".format(self.scanner.ignore_content_length, self.scanner.wordlist)
        output += "\n\tUnique Depth: {}\n\tSSL: {}\n\t".format(self.scanner.unique_depth, self.scanner.ssl)
        return output

Ideally this would be included within the json file as well (as valid json) without being written to every scan object.