Phing plugin improvment

Add itunes shuffle command to OSX plugin.

Fix dircycle plugin

add current bookmark to rkj-repos theme

Don't clobber $HISTSIZE and $SAVEHIST

ignore any grep aliases that might be defined

Fix grep.zsh library

Fix for command autocomplete for Symfony 2.6.x

allow overriding lib/*.zsh in custom/lib

Added shuffle functionality to the itunes command in the OSX plugin.
iTunes 12 doesn't support setting the "shuffle" property on the playlist
from what I've read, so this simulates the user interacting with the
iTunes interface. The toggle option "clicks" the shuffle button in the
Now Playing area. This has the effect of toggling the shuffle setting on
whatever is currently playing. The on and off options use the Shuffle
menu bar items.

Usage: itunes shuffle [on|off|toggle]

dircycle right did not behave as expected and was fixed

Fix autojump script to support Nix installations

use pigz if available in extract plugin

[aws plugin] Changed brew cmd to properly report if awscli is installed via homebrew

Fix Yosemite broken zsh

Added VIRTUAL_ENV_DISABLE_PROMPT to steeef.zsh-theme

Simplify superjarin theme and support chruby

Sourcing oh-my-zsh immediately after export PATH.

Switch back to oh-my-zsh.hide-dirty setting again

[~] fix plugin pj

Commit 81004dfa reverted the change
in 9b811fb6 when editing the merge
conflict from #2928.

This commit fixes that so that we don't make the same mistake again.

First seen in http://git.io/Cdaj5Q

https://github.com/robbyrussell/oh-my-zsh/commit/bce74975d055529cbd186782e2fd99e6da840460

Fix for the profile plugin.

An error was introduced with 7f75bb90, which uses special vars. This is the
fix.

Use special variables where we can