Split functions into .zsh_functions. Make .zsh_functions.local and .zsh_aliases.local work.
Legibility
Update README.md
/usr/local/bin & /usr/local/sbin should be at the head of $PATH

Fixes #1
Reorganize .zshrc
Clean up .zsh_functions
Merge pull request #2 from unixorn/dogfooding-fixups

Dogfooding fixups