Bumped qunit and sinon. Added qunit-assert-html.
Fixed date-parsing logic so that it works on oldIE. Issue #323.
Use htmlEqual() so that we're more robust against cross-browser serialisation issues. Issue #323.
Fixed invalid HTML in the MapMenu template. Issue #323.
GridRow's constructor expected a FieldList object, but it was sometimes getting a plain array. Issue #323.
Use underscore's indexOf() and filter() rather than relying on native versions. Issue #323.
Misc test suite fixes for IE8. Fixes #323.