Add example of how to use a custom field (#508)
Add example of how to use a custom field (#508)

Problem:

The documentation for creating custom field types
does not tell the user how to use the custom field.

This gap in documentation was brought up by @estiens in
https://github.com/thoughtbot/administrate/issues/164.

Solution:

Add a note about how to use custom fields.
nando/administrate,vgsantoniazzi/administrate,dminchev/administrate,vgsantoniazzi/administrate,nando/administrate,nando/administrate,thoughtbot/administrate,joshua5201/administrate,dminchev/administrate,thoughtbot/administrate,BenMorganIO/administrate,vgsantoniazzi/administrate,thoughtbot/administrate,nando/administrate,dminchev/administrate,thoughtbot/administrate,dminchev/administrate,joshua5201/administrate,BenMorganIO/administrate,BenMorganIO/administrate,joshua5201/administrate,BenMorganIO/administrate,vgsantoniazzi/administrate,joshua5201/administrate