Enable the System V messages support for PHP
Update Elasticsearch to 1.0.1
Support Erlang 17.0-rc2 with kerl
Updated php
Support HHVM 2.4.2
Revert the update to PHP 5.3.28.

There is a compilation issue related to ZTS support.
Merge pull request #278 from loren/patch-1

Update Elasticsearch to 1.0.1
Merge pull request #279 from josevalim/patch-2

Support Erlang 17.0-rc2 with kerl
Merge pull request #281 from GrahamCampbell/hhvm

Support HHVM 2.4.2
Merge pull request #252 from rybakit/patch-1

Enable the System V messages support for PHP
bump node to 10.26
bump rvm to 1.25.20
Installing a boost-backport PPA repository.

HHVM 2.4.2 requires libboost-* 1.49.0 which are not available on 12.04.

Related to #281.