Source ~/.zshrc.local if it exists

Follows the pattern of:

* ~/.aliases.local in ce7ad49
* ~/.gitconfig.local in 8e141fe
* ~/.vimrc.local in a666267

Use consistent:

* `source`ing style.
* commenting style.

I am using ~/.zshrc.local as a home for `eval "$(rbenv init -)"`.
alias goodmorning
Code metric aliases: flog, rbp, reek
Include gitconfig.local file for personal changes

* assumes same directory existance
* allows for easier addition of personal configs
Homebrew packages to be installed on all machines

Includes cask packages for OSX GUI apps such as Chrome, Spotify, and
Things.
Change permissions, reorganize content