Fixed with 0.3.3 release
Travis + HHVM changes:

* Only install PHP extensions when building under PHP proper
* Expanded commands in travis-init.sh for readability
Merge pull request #259 from jmalloc/hhvm-no-extensions

Stop HHVM build from hanging
Merge branch 'refs/heads/future-tick'
Updated changelog
No need to load the autoloader for something we're not going to use
Merge pull request #263 from WyriHaximus/master

No need to load the autoloader for something we're not going to use