update to active-fedora 6.x and solrizer 3.x
remove utc date mapper
remove active-fedora <5.x version checking logic.
fixup remove utc date
fixup remove utc date
remove ActiveFedora::Relationships
use symbols for relationship names
mark ng_xml as changed instead of content.
add has_model assertions for the whole ActiveFedora::Base hierarchy
remove Solrizer::FieldNameMapper reference
use solrizer to calculate field names
add additional indexing to some OM terms
use the new solrizer 3.x insert field API
use solrizer to calculate field names
mark Editable#agreement= as pending
use the objectType :facetable field instead of the :string field.