Sort calculation results of a historical discharge calculation based on their start date. Therefore, there are two new inner classes TimerangeItem and HistoricalTimerangeItem that wrap a W, Q, Timerange (and delta Q). WQTimerange and HistoricalWQTimerange now implement a sort() that return the results (TimerangeItem or HistoricalWQTimerangeItem) sorted by their start date.

For the artifact database
# su - postgres
$ createuser --no-createrole --no-superuser --pwprompt --no-createdb artifacts
$ createdb --encoding=UTF-8 --owner artifacts artifactsdb

For the flys database

# su - postgres
$ createuser --no-createrole --no-superuser --pwprompt --no-createdb flys
$ createdb --encoding=UTF-8 --owner flys flystest1