Revert "Merge pull request #1 from justinforce/remove_gemfile_hack"

This reverts commit d50d48bc07ae5f2caeff3f4d6df626745b89a2d8, reversing
changes made to 129a12db1929919e35ed9fe5f71afcdb64f97432.

Conflicts:
	commands/update

That bug totally isn't fixed. :rage: