Merge pull request #2 from archiloque/master

Detect pcap-ng files
Merge pull request #3 from archiloque/master

Massive housecleaning: make it look like actual ruby code
Merge pull request #4 from archiloque/master

More fixes
Merge pull request #5 from archiloque/master

Better handling of bad cases
Add only parse mode
Merge branch 'master' of github.com:bpaquet/pcap_tools
Full rewrite using tshark instead of BinData
Always display wireshark index
Filtering as module
Add disabled protocols, and extract data from raw tcp packet
Generate list of all dissectors to disable