move query of the weather service api to javascript and store IANA time zone in state

assets/src/scripts/components/hydrograph/axes.js

assets/src/scripts/components/hydrograph/index.js

assets/src/scripts/components/hydrograph/statistics.js

assets/src/scripts/components/hydrograph/timeSeries.js

assets/src/scripts/components/hydrograph/tooltip.js

assets/src/scripts/selectors/timeSeriesSelector.js

wdfn-server/waterdata/templates/monitoring_location.html

wdfn-server/waterdata/utils.py

wdfn-server/waterdata/views.py