Nest helper under credential

I noticed this when git kept asking me for user/pass.
It seems helper was under the wrong namespace
Merge pull request #82 from pcasaretto/fix-gitconfig

Nest helper under credential
Updated bin/git-track for git 1.8
Merge pull request #84 from jacobwg/update-git-track

Updated bin/git-track for git 1.8
Update bootstrap

Use env(1) to locate shell binary (see http://en.wikipedia.org/wiki/Shebang_%28Unix%29#Portability).
Merge pull request #88 from rc5hack/patch-1

Better portability
Use the new fork page
Merge branch 'master' of https://github.com/holman/dotfiles

* 'master' of https://github.com/holman/dotfiles:
  Use the new fork page
  Update bootstrap
  Updated bin/git-track for git 1.8
  Nest helper under credential

Conflicts:
	README.markdown