add xcode instructions for mavericks
Update script/bootstrap sudo to pass environment variables.

When executing a boxen run from inside the corporate firewall we need to pass
proxies through to sudo so that bundler will be installed properly as root.
Merge pull request #489 from johnbellone/patch-2

Update script/bootstrap sudo to pass environment variables.
update XCode instructions re: boxen-web
Merge pull request #485 from afeld/patch-1

Add XCode instructions for Mavericks
OSX -> OS X
Update README.md

I found a superfluous space, and also because you are _in_ the directories you need to `./script/boxen` each time.
Merge pull request #490 from jjasghar/patch-1

Update README.md
Bump dnsmasq to v1.0.1
Update Puppetfile.lock

$  bundle exec librarian-puppet install
This also removed the older cache version, so replacing it with the new
tar.gz file
Merge pull request #496 from viddo/bump-dnsmasq-to-v1.0.1

Bump dnsmasq to v1.0.1
Update versions and fix readline link of ruby
Merge branch 'master' of https://github.com/boxen/our-boxen

Conflicts:
	Puppetfile.lock