Phabricator as our future code contribution and review tool?

This possibility has implications for current and new code contributors, as well as local testing and continuous integration.

We welcome more feedback at

https://www.mediawiki.org/wiki/Requests_for_comment/Phabricator

Identify features Gerrit users would miss in Phabricator http://fab.wmflabs.org/T47

and subtasks such as

Find way to use Differential with plain git (i.e.: without requiring arc) http://fab.wmflabs.org/T207