Add ability to filter Shift csv export by week
Add blank rows to csv for id skips in Shift#export
Add 'all' option to shift index multiselect filters
Add 'list unconfirmed shifts' view
Add billing rate to shift table
fix paths and css in shift index table
Fix bug in which shift list filter not including no-rider shifts
Add specs fror double shift/conflict display in grid views
Add callback to capitalize rider name on creation