[skip] Dropped the "Testing Notes" section from the Weekly Report
[refactor] Extracted each section of the Weekly Report into its own partial
[refactor] Extracted some of the logic for the Weekly Report header to helpers and to the Weekly Report object
[refactor] Stopped passing @date_range to the weekly report template; that value a property of WeeklyReport
[refactor] Extracted next_week and prev_week from Weekly Report template
[refactor] Extracted logic from commits partial to WeeklyReport::CommitStats
[refactor] Moved the lookup of the global value for a Project color to Project
[refactored] Refactored WeeklyReport::CommitStats a little more
[refactor] Extracted logic from exceptions partial to WeeklyReport::BugStats and WeeklyReport::NoticeStats
[refactor] Extracted HistoricalWeeklyStats from CommitStats, BugStats, and NoticeStats
[refactor] Extracted logic from tickets partial to WeeklyReport::TicketStats
[refactor] Extracted logic from maintenance partial to WeeklyReport::MaintenanceStats
[refactor] Moved section boilerplate back into the main Weekly Report template