Update modules to latest versions at 2013-12-03

Changes:

- boxen (3.3.4 -> 3.3.5)
- chrome (1.1.1 -> 1.1.2)
- dropbox (1.1.1 -> 1.2.0)
- firefox (1.1.4 -> 1.1.5)
- foreman (1.0.0 -> 1.1.0)
- gcc (2.0.1 -> 2.0.99)
- git (1.3.2 -> 1.3.6)
- go (1.0.0 -> 2.0.1)
- heroku (2.0.0 -> 2.1.1)
- homebrew (1.5.1 -> 1.6.0)
- hub (1.1.0 -> 1.2.0)
- intellij (1.3.0 -> 1.4.0)
- istatmenus4 (1.0.0 -> 1.1.0)
- iterm2 (1.0.3 -> 1.0.5)
- keyremap4macbook (1.0.8 -> 1.2.1)
- mysql (1.1.5 -> 1.2.0)
- nginx (1.4.2 -> 1.4.3)
- nodejs (3.4.1 -> 3.5.0)
- osx (2.0.0 -> 2.2.0)
- packer (1.0.3 -> 1.1.0)
- phantomjs (2.0.2 -> 2.1.0)
- postgresql (2.0.1 -> 2.2.2)
- pycharm (1.0.3 -> 1.0.4)
- qt (1.0.1 -> 1.1.0)
- ruby (6.7.2 -> 6.7.6)
- rubymine (1.0.3 -> 1.1.0)
- skype (1.0.6 -> 1.0.7)
- unarchiver (1.2.0 -> 1.3.0)
- vmware_fusion (1.0.0 -> 1.1.0)
- xquartz (1.1.0 -> 1.1.1)
Merge pull request #43 from alphagov/update-all-the-things

Update modules to latest versions at 2013-12-03