Remove unused path
Option to disable timestamp in the ping payload

Simplify the args to the ping functions by using a record. Add an option
to disable the calculation of the elapsed time, allowing the full payload
to be passed back to the user.
Remove redundant clause
Don't calculate timestamp from payload
Update ping/5 -> ping/3
Do not return the port in recv/2,3
Clean up host name resolving
Procket interface changes
Optionally do not fork helper to get raw socket

gen_icmp uses procket to get the raw socket for ping'ing. For safety,
procket calls a setuid helper program to create the socket. If it's ok
to run beam with escalated privs, gen_icmp has the option of requesting
the socket within Erlang.

Thanks to @uwe_ on twitter for the suggestion!
Switch to github rebar
Switch to pkt from epcap_net
Suppress error log
Document ptun and use of capabilities
Correct comment

timestamp was removed from ICMP packet to increase throughput
Check deps
Update README
Generate app file
Remove whitespace
README cleanup
readme: example of ping with socket arg