Merge pull request #61 from mbucknell/wdfn-54

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

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

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

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

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

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

assets/src/scripts/index.js

assets/src/scripts/models.js

assets/src/scripts/models.spec.js

assets/src/styles/components/_hydrograph.scss

config.py

karma.conf.js

package-lock.json

package.json

waterdata/templates/base.html

waterdata/templates/monitoring_location.html