7 merge requests!319add all changes of dev into release v1.4.0 branch,!318Resolve "release v1.4.0",!299Draft: Merge default data handler and preprocessing support parameter use_multiprocessing....,!284default data handler and preprocessing support parameter use_multiprocessing....,!283Merge latest develop into falcos issue,!281Resolve "add switch to use multiprocessing",!259Draft: Resolve "WRF-Datahandler should inherit from SingleStationDatahandler"
