.osx: Allow installing Chrome user scripts via GitHub Gist or Userscripts.org
.osx: Change minimize/maximize window effect

By default, OS X Mavericks uses the annoying `genie` effect whenever windows are minimized/maximized. This commit changes that preference and makes OS X use the more tolerable `scale` effect.

Closes #355. Ref. #270.
.osx: Remove “disable opening and closing window animations”

Sadly, this doesn’t work anymore in OS X 10.9.

Closes #270.
.osx: Comment computer name settings

It’s good to have these commands here as a reference, but it’s annoying when running `.osx` on multiple computers in the same network.
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  .osx: Comment computer name settings
  .osx: Remove “disable opening and closing window animations”
  .osx: Change minimize/maximize window effect
  .osx: Allow installing Chrome user scripts via GitHub Gist or Userscripts.org

Conflicts:
	.osx