[skip] Rewrote seeds
[skip] Added role to the name of each user in the tester bar
[fix] Fixed a few bugs with antecedents
[improvement] Added Unfuddle ticket components to tags
[improvement] Rendered information about ticket type and ticket tags to the Prioritization view
[refactor] Dropped unused fields and tables from the database
[refactor] Removed references to the deprecated field 'version_control_location'; Moved knowledge of GitHub URLs to the Git Adapter
[refactor] Removed references to the deprecated field 'error_tracker_id'
[improvement] Added 'created_at' to the API of a Ticket: set tickets created_at timestamps to the value set by the ticket tracking system
[refactor] Added 'all_tickets' to the API of a Ticket Tracker: used it to periodically sync all tickets with a cron job (in order to set 'closed_at' timestamps appropriately)
[improvement] Redesigned the tickets section of the Weekly Report to show Type (not Severity) and to pull created_at and closed_at from local tickets so that the report is no longer dependent on Unfuddle
[fix] Updated Houston Scheduler: fixing a few small issues with the Prioritization view
[skip] Updated various dependencies
[skip] Deleted commented-out code in the seeds file
[refactor] Extracted TicketSynchronization from Project to reduce complexity and to allow different use-cases to eager-load different things
[skip] Deleted unused code
[refactor] Extracted RemoteRepo and GithubRepo out of GitAdapter::Repo as subclasses because they are cases which are---and are more specific than---Git Repo