users can change their apartment's chore assignment day
moved assign chore to chore model
when user updates points doesn't affect his total week points
fixed nav bar link
Created rake tasks for automatically zeroing out total week points and completed week points on user's apt chore assignment day and automatically assigning new chores on apartment chore assignment day
added condition that auto chore assignment will only run if yesterday was apartment's chore assignment day
Merge branch 'auto_chore_assignment' into development