We should be able to run while homeless

There's no reason to try expanding '~' if BERKSHELF_PATH is set

It's an annoyance when using berkshelf to bootstrap chef-solo in an
environment like an init script or chroot
squashme
Use an instance variable for berkshelf_path to match style
Create a new fake remote git repo instead of trying to clone from the internet.
Refactor git helpers to separate concerns for methods
Merge branch 'master' into autocreate_git_remotes

Conflicts:
	spec/spec_helper.rb
Correct merge
formatting consistency fixes
Merge pull request #367 from RiotGames/autocreate_git_remotes

Autocreate git remotes
Merge pull request #340 from blasdelf/master

Remove unnecessary hard dependency on $HOME being set
don't cache the location of the Berkshelf