WIP: [DONT MERGE] Add shoe size to a member's profile

Mark Boute
2020-02-19T21:01:43+01:00

### Short description

Adds a shoe size to the memberprofile

(INT, min 39, max 47, can be null for out of range)

Data can be used to reserve shoes at a bowling centre.

### Steps to use this feature

1. Users can add their shoe size to their profiles.
2. Admins can change people their shoe sizes.