Use d3 to check how an element is classed

By using d3, we can ensure that this is compatible with IE 11.
Update changelog
Merge pull request #213 from matthewdunsdon/feature/allow-ie-11-highlighting

Allow filter highlighting in IE11
Use insight types as params

Replaces instances of Legend, Axis, Series and Chart in the JSDocs with
their insight.* counterparts.
Merge pull request #212 from tpkelly/develop

Use Capitalised types
Merge branch 'upstream' into develop
Merge branch 'develop' into feature/minor-docs-cleanup

Conflicts:
	src/charts/Chart.js