Filter out more MIMEtypes.

The SOAP call getDatastreamText uses behind the scenes can blow up
with large datastreams... What exactly the threshold is, I don't know...
...  in our case, it was a > 100 MB wav file.
Merge pull request #27 from adam-vessey/filter-more-mimes

Filter out more MIMEtypes.
Added WORKFLOW to solr into basic solr config.
Changed related items dates to be multivalued only as we may have one ore more related items.
Merge pull request #29 from nigelgbanks/multivalued-only-related-item-dates

Changed related items dates to be multivalued only as we may have one or...
Adams speedier query.
Merge pull request #30 from nigelgbanks/multivalued-only-related-item-dates

Adams speedier query.
Allow date fields to be used as searchable text fields.
Merge pull request #31 from nigelgbanks/searchable-dates

Allow date fields to be used as searchable text fields.
Include the authority in the solr field name if present. Sort the attributes used in date fields.
Sort should also include the namespace.
Authorities should be an additional field.
Merge pull request #32 from nigelgbanks/authority

Include the authority in the solr field name if present. Sort the attrib...
Merge pull request #28 from MorganDawe/modular

Added WORKFLOW to solr into basic solr config.