New artisan command: account:reset
Summary:
./artisan account:reset <id, username or mail>
Fixes T482.
Test Plan:
./artisan account:reset 5
./artisan account:reset quux --subject="Quuxians, révoltez-vous"
Reviewers: dereckson
Maniphest Tasks: T482
Differential Revision: http://devcentral.nasqueron.org/D26