IPV6 compile fix on unbuntu.
Untrack local generated files.
Merge branch 'issue2-untrack-local-file'
Merge pull request #1 from sunyc/issue1-ipv6-compile

IPV6 compile fix on unbuntu.
Merge pull request #3 from sunyc/issue2-untrack-local-file

Untrack local generated files.
Added POSIX_TIMERS alternative for eval timer

Added timer_settime/timer_gettime alternative implementation
for eval_cost.  This fixes the issue where get_eval returns
negative numbers when the elapsed wall time is greater than
the CPU time spent.

The reason for using POSIX timers rather than merely adding
a getitimer() call to the default implementation is better
precision.  On Linux, the values returned by getitimer()
are rounded off to the nearest jiffy (1/250 of a second),
whereas the POSIX timers have nanosecond precision.
Merge pull request #6 from Voltara/issue2-eval_cost_posix_timer-rebased_single_commit

Added POSIX_TIMERS alternative for eval timer
Merge remote-tracking branch 'upstream/next-2.27'