move vagrant off ssd
.osx: Add SSD-specific tweaks

Source: http://forums.macrumors.com/showthread.php?t=1505922
.aliases: Add `afk` to lock the screen

Closes #258.

Conflicts:
	.aliases
.osx: Fix `ShowPathBar` typo

Closes #204.
bootstrap.sh: Avoid `source` if there are no changes

Closes #220.

Conflicts:
	bootstrap.sh
.aliases: Add `-F` to `ls` aliases

Don’t do this for the default `ls`, though.

Closes #234.

Conflicts:
	.aliases
.osx: Remove old iTunes commands

They only applied to iTunes 10 and older anyway.

Conflicts:
	.osx
.osx: Don’t prompt when quitting iTerm

Conflicts:
	.osx