.osx: Use `sudo` for `systemsetup`

Closes #415.
.osx: Disable the all-too-sensitive backswipe on Chrome

Closes #416.
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  .osx: Disable the all-too-sensitive backswipe on Chrome
  .osx: Use `sudo` for `systemsetup`

Conflicts:
	.osx
Merge branch 'master' of git://github.com/aclemen1/dotfiles

* 'master' of git://github.com/aclemen1/dotfiles:
  Remove .aliases~ file.