Implement Rollup builds

assets/.babelrc

assets/package-lock.json

assets/package.json

assets/rollup.config.js

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

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

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

assets/src/scripts/components/map/floodSlider.spec.js

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

assets/src/scripts/components/map/legend.js

assets/src/scripts/index.js

assets/src/scripts/selectors/medianStatisticsSelector.js

assets/src/scripts/store/index.js

assets/src/scripts/store/index.spec.js

assets/src/scripts/store/seriesReducer.js

assets/src/scripts/store/timeSeriesStateReducer.js

assets/src/styles/components/hydrograph/_app.scss

assets/src/styles/pages/_monitoring_location.scss

wdfn-server/waterdata/templates/macros/components.html

wdfn-server/waterdata/templates/monitoring_location.html