Rename to hasNoParameter because the method returns true if no parameters are set
Update method name
Fix typo
Fix issue if request contains featureOfInterest identifier and procedure/observableProperty identifier by adding feattureOfInterest identifier restriction to query
Fix performance issue with first/latest GetObservation requests and series concept.
Get first/latest timestamp from series if available instead of querying the first/latest timestamp for series from observation table.
Increase version to 4.1.1
Merge pull request #144 from CarstenHollmann/master

Update to version 4.1.1