Merge pull request #7 from elfixit/master

Reply to OPTIONS requests with the right headers to accept cross site requests.
Fix segfault when opening pcap file fails.
Fix flow performances in output pcap_flow.
Fix segault and small memleak with input_dvb_atsc.
Fix segfault if output initialization fails.
Add output_get_name().
Add register_func and unregister_func for outputs.
Add event pcap_flow_file to output pcap_flow.
Merge branch 'master' of github.com:gmsoft-tuxicoman/pom-ng