Replace SSH with HTTPS for github access

This is so the CI system doesn't require a github account to run.
Made the vagrant working directory configurable and defaulted to /tmp/boxci,
fixes #1
Merge pull request #44 from reachlocal/update_vagrant_working_directory

Made the vagrant working directory configurable
Merge pull request #43 from drujensen/github-https-bug

Replace SSH with HTTPS for github access
Boxify BoxCI

So we can add to Bamboo for CI