Add option to dsiable Cassandra's IPv4 stack preference.
Allow parts of node.travis_build_environment to be overridden
Specify dependent cookbooks for rvm cookbook
add missing metadata.rb files
Update cassandra-env.sh file from release.

Bump version to 1.2.4 and default config directory to the correct
one on the system.
Update MD5 hash for Cassandra package.
update elasticsearch to 0.90.1
update phantomjs to 1.9.1
create and alias for go1.0 => go1.0.3
update version of cassandra to 1.2.5
never forget a ,, ok!
update the 5.14 and 5.16 perl patch versions
oops, perl 5.12 also got an update
removing the mirrors for now

our VMs are based in the US and our mirrors in the EU, which doesn't make a huge amount of sense right now, we are looking at fixing that soon though
added perl 5.19
MERGING ALL THE THINGS

Merge branch 'master' into mm-cassandra-ipv6

Conflicts:
	ci_environment/cassandra/attributes/default.rb
Merge pull request #174 from travis-ci/mm-cassandra-ipv6

Add option to disable Cassandra's IPv4 stack preference.
damn you ,!
Merge branch 'master' of https://github.com/travis-ci/travis-cookbooks
Support for PHP 5.3.26, 5.4.16 and 5.5.0RC3.