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
Conver the More Context section into a History section

A history section that provides context :) around the origin and progression of VVV from an internal 10up project to a community organization.
Add an initial CONTRIBUTING document
Move milestones and labels down
Update CHANGELOG with current 1.1 list
Update recommended versions for Vagrant and VirtualBox
Add a link to contributing guidelines in README
Make all contributors links HTTPS

It's like you could tell when GitHub started defaulting to https for everything. Or it's like I typed everything manually before? I don't get it.
Tweak section on WordPress and Vagrant mailing list
Merge pull request #283 from Varying-Vagrant-Vagrants/housekeeping

[PR] Update README, Add initial CONTRIBUTING document
Add Caveats section to readme

Users that are unfamiliar with the project may find some aspects unintuitive.  We should try and warn them so that they can have a better experience 

These are all ways that users broke VVV while I was helping them at WordCamp Lancaster