rapidftr/tracker#40 - Remove Hard Coded Values, Use Solr for Filtering/Ordering

This pull request reflects most of the work from issue rapidftr/tracker#40.

We are removing hard coded values, like the use of "name" as a standard field in forms, to allow flexibility for future changes.

Due to constraints with CouchDB views, we have changed filtering and ordering on the Children index page to use Solr.  Until we expand on dynamically creating searchable/sortable/filterable fields, the types of ordering/filtering on the index page is limited.