First stab at making ariadne deployable. [GH-44]
Merge branch 'develop' into 44-knife-solo

Conflicts:
	README.md
	Vagrantfile
Merge branch 'develop' into 44-knife-solo

Conflicts:
	Gemfile.lock
Added instructions to boot rackspace server via CLI.
Updates mysql cookbook to deal with bug for set_unless on chef-solo.
Adds link to Rackspace server provision instructions. Updates recommended chef version to deploy.
Moves mysql role to top of acquia role because php5-mysql package needs mysql first.
Moves nonsecure mysql passwords setting from vagrantfile to role for now.
Creates vagrant user if doesn't exist to avoid chef run failure in phpcs drupal_standard recipe.
Custom drupalcs phpcs recipe now adds a vagrant home dir.
Pins libmysqlclient16 pkg to pull from percona apt repo.
Fixes issue with non-ascii char in webgrind cookbook template crashing chef.
Moves deploy gems out of :development group for bundler.
Only forwards ssh agent session w/ local vagrant.

Agent forwarding won't work until knife-solo is patched.
See: https://github.com/matschaffer/knife-solo/issues/121#issuecomment-12636204
Moves default last-mile recipes from vagrantfile to role.
Adds directory in recipe that would normally be created as part of local shared in init rake task.
Bumps chef version from 10.16.6 to 10.18.6.
Merge pull request #44 from myplanetdigital/44-knife-solo

Adds ability to deploy to remote server.