Instead of thowing an error just use default sort order
Show rebellion rates for whole person rather than just member
Use person sort orders rather than member sort orders
A bug introduced in 43c7b9e means the secondary sort order is lost
Revert "A bug introduced in 43c7b9e means the secondary sort order is lost"

This reverts commit 80362f3a4a2a7eda7e05bdf3bfba6c47591a460c.
Consolidate sorting into one place
Sort in Ruby
Restore secondary sort order that was lost in 43c7b9e
Remove unused sort field

You can't display previous members so it makes no sense to sort on the
left_house field since it will always be the same for current members.
Sort entered_date in descending order
Merge pull request #425 from openaustralia/attendance-rebellion-sort

Sort attendance & rebellion by person rather than member