better support for herbarium specimens

[brettatoms]

Need to better support for data that is associated with a herbarium specimen. Where possible we should be able to add fields to the collection table where applicable but we will probably at least need a new specimen table.

See HISPID, Herbarium Information Standards and Protocols for Interchange of Data, at:
http://hiscom.chah.org.au/wiki/index.php/Herbarium_Information_Standards_and_Protocols_for_Interchange_of_Data

HISPID will probably include every field we need to worry about.

[brettatoms (brettatoms)]

This will probably be a post 1.0 project. Need to work with someone who is more familiar with herbarium specimens.

[brettatoms (brettatoms)]

Also see ABCD schema's Unit/HerbariumUnit field.