v1.2.0

• Used iptables-save / iptables-restore when updating blocklist instead of adding each rule individually, which speeds the process up considerably.
• Updated option processing so optimization can be disabled from the commandline (eg, "--no-optimize").
• Leveraged IPC::Run to run commands.
• Fixed GPG verification.
• Removed hardcoded version number from user-agent string.
• Added $ipt_extra_args variable, for extra arguments to include when calling iptables.