Install `karma` and `yo` with npm

Globally install two additional node packages.

Karma is a JS unit test runner.
Yo is a command line tool for scaffolding projects.
bash: export PhantomJS's `bin`

PhantomJS is installed with Homebrew. This exports the package's `bin`
for other software (like Karma) to be able to run PhantomJS.
git: make `who` alias more useful

Make this alias expose people who have recently been active committers.
It will display an ordered list of people who have made commits in the
last 3 months. All merge commits are ignored.
Update list of Node packages in README
vim: make gvim text size smaller
Remove PhantonJS bash export

Again, this tries to reference to `brew` command before the environment
knows the location of a custom Homebrew installation. Loading
`bash_exports` after local bash settings would defeat the point. So for
Karma to know PhantonJS's bin location when Homebrew is not in the
default directory, the bin export will need to be defined in the
`.bash_profile.local` file.
Update submodule 'ctrlp' to the latest version
Update submodule 'html5' to the latest version
Update submodule 'mustache' to the latest version
Update submodule 'syntastic' to the latest version
Update submodule 'vim-git' to the latest version
Update submodule 'vim-javascript' to the latest version
Update submodule 'vim-less' to the latest version
Update submodule 'vim-markdown' to the latest version
Update submodule 'vim-pathogen' to the latest version
Update submodule 'ctrlp.vim'
Update submodule 'html5'
Update submodule 'syntastic'
Update submodule 'vim-haml'
Update submodule 'vim-javascript'