Adding --allow-root to all wp-cli calls

wp-cli now requires --allow-root in order to run as the root user due to security concerns (see https://github.com/wp-cli/wp-cli/issues/982 and https://github.com/wp-cli/wp-cli/pull/973).  I've added this flag to all uses of wp-cli in provision.sh.  The auto-site setup stuff will need adjustment as well, but I'm less familiar with those and will have to take a closer look to see where that is needed.
Update GitHub URLs in README to point to the new repository
Add an origin statement highlighting 10up for the contribution of the VVV project
Transitioned sounds better than moved
Merge pull request #272 from Varying-Vagrant-Vagrants/transition-docs

[PR] Update README with transition note
Added file paths to default dashboard

Added file paths to the default dashboard to help clarify which urls load which directories
Merge pull request #275 from salcode/dashboard-show-paths

Added file paths to default dashboard
Update contributors list
Update github URLs to new location in README.md
Merge pull request #280 from salcode/readme-correction

Update github URLs to new location in README.md

Closes #279
Pulling from upstream, adding debug to develop