input-forms.xml: Add new CCAFS communities to input-forms
messages.xml: Clean up title and trail for custom browse types
dspace.cfg: Set mandatory bitstreams to false

This accidentally became true when I merged the dspace.cfg into git
a few weeks ago.
Add ability to browse by Output Type

Requires an index-init to create the new browse / search indexes.
input-forms.xml: Add animal species to ILRI Journal submission template