install bundler 1.5.1 by default
Merge branch 'master' of github.com:travis-ci/travis-cookbooks
upgrade to rake 0.9.6
don't autoupdate, don't install rubygems-bundler
lets use default.gems instead of global.gems
removed some gemset cleanup, as recommended by @mpapis
remove another gemset empty (@mpapis)
newlines goodtimes
bump the stable node version
correct the syntax for bundler version in default.gems
and upgrade rake to ~>10.1.1
allow rake to be installed as it is required by some rubies
correct the jruby default.gems as well
Preinstall redis extension for PHP.

Fixes #254.
remove default.gems and use rvm_with_gems
Merge branch 'master' of github.com:travis-ci/travis-cookbooks
remove the remote_directory for .rvm/gemsets
correct the rvm_with_gems to rvm_with_default_gems
and correct the version syntax
Upgrade PyPy to 2.2.1
Merge pull request #256 from alex/patch-1

Upgrade PyPy to 2.2.1
Upgrade virtualenv to 1.11

And with it upgrade pip to 1.5

Refs: https://github.com/travis-ci/travis-ci/issues/1813