Adds support for SOLR range facets
Adds facet Range to SOLR Paginated Results
Adds Group by range
Merge branch 'master' into feature/solr-range-facet

Conflicts:
	db/src/main/java/com/psddev/dari/db/SolrPaginatedResult.java
Fixes compile errors caused by previous merge.
Formatting.
Fixes grouping by range with multiple fields
Adds missing SolrPaginated constructor
Fixes abstract database group by bucket calculation and key
Merge branch 'feature/solr-range-facet'