Change funders section of form to use multiple checkboxes

Previously it had an input field with an add button to add multiple
funders with arbitrary names.
Remove unused MultiAdd template
Add a free text field to the "Other" funder option
Send the other funder free text when creating Publications
Use 4 rather than 2 spaces for HTML indentation
Follow up on PR review
Merge remote-tracking branch 'culds/master' into avocet/add-new-funder-options

Conflicts:
	node_modules/oae-avocet/submitpublication/js/submitpublication.js