Separate lists of dev and metadata volunteers
Separate lists of dev and metadata volunteers

Add volunteer names to table views.

Refactor volunteer name list generation into a model method.

Addresses
https://github.com/openelections/openelections.github.io/issues/22,
https://github.com/openelections/openelections.github.io/issues/32

openelections/openelections.github.io,openelections/openelections.github.io,openelections/openelections.github.io