added output of model performance file
corrected error introduced by skintemperature formulation; now using LONGIN array for all cases also if assumed spatially invariable; also added output of model performance file
error fixed in input.txt of example, did not have number for discharge
removed on if methodlongin - forgot to delete earlier
minor format change
added all files to push up to github
cleaned up input.txt and corrected one error: discharge value was missing
Merge branch 'vestfonna'

changes up to 17 October implemented, somme errors found therefore pushed to master