Reinstating rusage efun.
Merge pull request #100 from sunyc/master

Reinstating rusage efun.
Adding missing detection for PCRE.
Update travis config.
Merge pull request #102 from sunyc/master

Adding missing detection for PCRE.
Fix ltrim bug (zolider), adding more test cases.

Also noted that 2nd argument to trim is a set.
Merge pull request #103 from sunyc/master

Fix ltrim bug (zolider), adding more test cases. …
Merge pull request #10 from fluffos/next-3.0

Next 3.0