.aliases: Add `jsc` alias

Useful for testing code in JavaScriptCore.

Hat tip: https://twitter.com/RussB/status/420409644117262336 (via @rauschma)
.functions: Make `np` remove `node_modules`

This lets you catch cases where you forgot to add a dependency to `package.json`.

Closes #321.
.osx: Support multiple `systemuiserver` pref files

Closes #319.
Brewfile: Install `p7zip` (i.e. `7z` etc.)
.osx: Kill `cfprefsd` after changing preferences

As of OS X 10.9 this is necessary to make sure the changes persist.

Closes #330.
Brewfile: Install ImageMagick with WebP support
.vimrc: Explicitly use the Molokai theme
Brewfile: install `moreutils`, if only for `sponge`

Hat tip: @chastell / http://talks.chastell.net/kodio-2014/#/21
Brewfile: install `pv` (pipe viewer)

Hat tip: @chastell / http://talks.chastell.net/kodio-2014/#/39
.osx: Make Dock more transparent

Closes #346.
Brewfile: explicitly list non-default taps
.functions: Add `a` alias for `atom`

Closes #349.
.osx: Remove old keyboard illumination settings

These commands don’t have any effect anymore in OS X 10.9.

Closes #327.
Merge branch 'master' of github.com:mathiasbynens/dotfiles

* 'master' of github.com:mathiasbynens/dotfiles:
  .osx: Remove old keyboard illumination settings
  .functions: Add `a` alias for `atom`
  Brewfile: explicitly list non-default taps
  .osx: Make Dock more transparent
  Brewfile: install `pv` (pipe viewer)
  Brewfile: install `moreutils`, if only for `sponge`
  .vimrc: Explicitly use the Molokai theme
  Brewfile: Install ImageMagick with WebP support
  .osx: Kill `cfprefsd` after changing preferences
  Brewfile: Install `p7zip` (i.e. `7z` etc.)
  .osx: Support multiple `systemuiserver` pref files
  .functions: Make `np` remove `node_modules`
  .aliases: Add `jsc` alias