Fix test for brew existance on grc.zsh

This fixes #73
Merge pull request #74 from pcasaretto/fix-grc-brew-testing

Fixes grc.zsh brew testing
Load .localrc before .zsh files

My .localrc loads Boxen details, which has Homebrew installs
in it. Loading it after .zsh files get loaded means I can't
get stuff like the grc suite detected on my path
Promote functions to root
Not a function, and I don't use it
Remove more old functions
Rename smartextract
Don't use lyrics either
Fix #76
Use bash not zsh or sh.
Merge pull request #78 from memborsky/fix-bootstrap-read

Use bash not zsh or sh.
Fix #59 git completion issue with @dplarson method.
Merge pull request #80 from memborsky/git-completion

Fix #59 git completion issue with @dplarson method.
Merge latest from @holman