Net component changelog:
2011-11-07 Jose Pedro Oliveira
* Dynamically detects the network interfaces
(i.e. the ones listed in /proc/net/dev)
* No longer needs to fork/exec the external ifconfig command and
parse its output. It now reads the Linux kernel network statistics
directly from /proc/net/dev.
* Each network interface now has 16 events instead of 13
(all counters in /proc/net/dev).
* Adds support for PAPI_event_name_to_code()
* Adds a couple of small tests/examples