Removed comments and other elements that might appear in the phing -l output. The current version doesn't work at all on my environment (OSX 10.7)
fix `-nt` usage
Changed brew cmd to properly report if awscli is installed via homebrew
additional tmux aliases
Added VIRTUAL_ENV_DISABLE_PROMPT to steeef.zsh-theme

This stops the virtual env name from being printed before it is actually being
used in the zsh prompt.
Remove deprecated brew commands, update core commands

`brew services` and `brew server` were moved to homebrew-boneyard.
Merge simplified superjarin theme
Fix autojump script to support Nix installations
ignore any grep aliases that might be defined
Fix Yosemite broken zsh where $PATH var does not get appended correctly.

Sourcing oh-my-zsh immediately after export PATH.
Fix chruby plugin to not complain if chruby is *not* installed
use pigz if available in extract plugin
Merge pull request #3309 from jarinudom/superjarin

Simplify superjarin theme and support chruby
Merge pull request #3283 from jaapz/master

Added VIRTUAL_ENV_DISABLE_PROMPT to steeef.zsh-theme
Merge pull request #3265 from thii/fix-yosemite-broken

Fix Yosemite broken zsh
Merge pull request #3092 from MWers/aws-brew-issue

[aws plugin] Changed brew cmd to properly report if awscli is installed via homebrew
Merge pull request #2871 from wrboyce/extract-pigz

use pigz if available in extract plugin
Merge pull request #2448 from gawashburn/master

Fix autojump script to support Nix installations
Throw an error message when $WORKON_HOME is not set

Took me a while to figure this one out, and I have a default installation of virtualenvwrapper -- this is a soft fix, just put an error message. But perhaps the fix should be to use the default value `~/.virtualenvs`.
Don't clobber HISTSIZE or SAVEHIST if they're already set