Added list of plugins to be pulled from GitHub.

To do this I created a "Gitplugin" resource that is used to do the Git pull of each plugin and then activate it using wp-cli.

Closes #115, #66
Moving gitplugin puppet resource definition to its own file.

Makes wp.pp cleaner.
Clean up gitplugin code.

Removed a reference to external variable within the gitpluin resource.
Fixing some code styling problems to resolve travis-ci problems.
Merge pull request #135 from Mobius5150/github_plugins

Github plugins
Add shout-out to other Vagrant bundles for non-VIP usage

Closes #68
Update PHP version in php manifest to 5.4.25

5.4.24-1+sury.org~precise+1 is no longer available in the oldstable PPA.  This version - 5.4.25-1+sury.org~precise+2 - may not perfectly mirror wp.com, but at least it can be installed.
Merge pull request #136 from ziz/fix-php

Update PHP version in php manifest to 5.4.25
Add keyring plugin because we run it on WordPress.com