Add `np` function to ease publishing node modules

I use this to ease the publishing of npm modules. `np`, done ;)

np = npm publish (and, `no problem`, (and `nutella party`))

Closes #261.
Personalize dotfiles, add emacs config, switch subl to SublimeText
Add git aliases to bash. Update README.
Update vimrc
Update installation instructions
Append npm completion to bash_profile
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Move aliases to aliases file
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Add git completion to bash profile
Execute git-completion from brew-installed git-completion.bash
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