Morpho

The new version of Morpho fails to display the access metadata associated with
older versions of EML. This seems to be because Morpho is configured to only
view the most recent version of EML in the config.xml file. For example, if I
have an old package that had an eml-access 2.0.0beta4 document associated with
it, and I try to open it under the new morpho, the access doc does not show up
in the list of other metadata. But if you edit the config.xml file and change
all references from "beta6" to "beta4" and relaunch morpho the files then show up.

The solution to this is to have morpho support multiple doctypes for each role
like access control. So, instead of a single "access_doctype" parameter, morpho
should take a list of doctypes. This is also true of other roles for doctypes
like "package_doctype" and any others. The idea is to have morpho work
seamlessly across EML upgrades and changes.

We may also want Morpho to be able to automatically connect to a server and
download the most recent version of eml with all of the relevant config files so
that users can easily upgrade their version of eml without understanding the
cryptic way in which Morpho configuration works.