increase test coverage and minor refactoring
getSpecifiedTypedValueArray(): adjusted javadoc and implemented as deletegate to new method
added constants for SOS 2.0 InsertObservation: result/phenonemonTime
add constant for gml32:TimeInstant QName required by SOS 2.0
Build InsertObservation: finished first version for measurement incl. test; TODO (=: open issues) added, too