Added some low level methods to ICdmDataSource implementations. Refactored uri handling into a utililty class
bugfix for getSingleValue
schema update framework
merged from branches/cdmlib/2.2 7238-7345 into trunk
Added methods concerning taxonomic tree to taxon service.
Taraxacum Import: Update sec_id of Taraxacum taxa (merged from 2.0 & improved)
data sources update and tests
test connection and ICdmDatasource getters