Updated default db name and added error message to search.php when default db is invalid
CSF->loadMappings now handles v1.6 or v1.9

Still need to work on the rest of the object!
Formatting changes only
Fixed a typo in which a concept without a preferred name tag returned null concept name
Added support for OMRS v1.9 concept_name.concept_name_type

Added field to ConceptName, modified version-specific SQL to
ConceptSearchFactory, modified preferred name methods in ConceptName
and Concept, added preferred name constants to DefaultSettings.
Added Concept::getMappingsBySourceName()
Added ConceptCollection::merge()
Added union and intersect methods to ConceptList
Modified CSSC to work with dict_db or dict_name
Added helper functions to ConceptListFactory
Commenting updates only
Created ConceptCollectionFactory to enable creation of ConceptCollection objects without searching
Web services to merge and persist concept collections
First iteration of the collection comparison tool