Change the name of the class SolrFieldParser to IDocumentSubprocessorFactory.
Add SolrDoc and SolrElementField class.
added more classes to the index diagram to reflect current state of the code - needs to be updated to include plan for implementation (e.g., DocType object is not what we want). http://bugzilla.ecoinformatics.org/show_bug.cgi?id=5884
enable plantuml generation when building the sphinx documentation. note that you do need to have graphviz installed, but hopefully that is all.