Enable the System V messages support for PHP
Merge pull request #270 from BanzaiMan/ha-feature-cassandra_2.0.5

Update cassandra to 2.0.5.
Quick fix ChefSpec Tests by freezing Chef 11.8 dep

We'll check later how the ChefSpec examples should be
re-written to properly integrate with Chef 11.10+
Support PHP 5.6.0alpha2.
Support HHVM 2.4.1.
fix(travis-build-environment): update known_hosts file

The keys were pulled using ssh-keyscan and verified against GitHub's
SSHFP records as well as their website:

https://help.github.com/articles/what-are-github-s-ssh-key-fingerprints

Fixes travis-ci/travis-ci#1588.
Merge pull request #275 from travis-ci/hh-github-ssh-hostkey

fix(travis-build-environment): update known_hosts file
update URL for downloading rebar binary
Merge pull request #276 from nuex/update_rebar_source

update URL for downloading rebar binary
Update changes.md
Update changes.md
Support PHP 5.6.0alpha3
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