Adding packet_isodate() function.

This function will return a datetime object instead of a string object. Useful
for situations when you need a datetime object to work with.

If you choose to use packet_isodate() you need to handle situations where a user
wants your module output in JSON format since you cannot serialize a datetime
object into JSON.
Adding metacap module.

The metacap module parses a PCAP and outputs a summary of its contents. It
currently supports:

    -   PCAP start time
    -   PCAP end time
    -   PCAP total # of packets
    -   PCAP total # of streams
    -   PCAP total data transferred
    -   PCAP streams:
        -   stream start time
        -   stream end time
        -   stream client data transfer total
        -   stream server data transfer total
        -   stream src ip
        -   stream src port
        -   stream dst ip
        -   stream dst port
        -   stream communication order
            -   list of tuples containing (from, data)
                -   from is “C” for client, or “S” for server
                -   data is the size of the payload

By default, the module will output all information as strings so you can use it
safely with ChopShop's -J option. If you need dates converted into datetime
objects you can use metacap's "-i" option.
Adding -s (--stream) option to metacap.

This option will output the information of each stream as they are
parsed as long as they have a proper teardown. If they do not have a
proper teardown, their information will be output along with the final
pcap metadata at the end.
Renaming session to stream for consistency.
Merge pull request #4 from MITRECND/metacap

metacap module