Add support for Kissmetrics

[vpodk]

Kissmetrics JavaScript Library

// Records an event and executes the callback function after it’s recorded.
_kmq.push(['record', 'EVENT_NAME', {'PROPERTY_NAME': 'VALUE'}, callbackFn]);

// Tags a link that takes someone to another domain.
_kmq.push(['trackClickOnOutboundLink', 'AN_ELEMENT_ID_OR_CLASS', 'EVENT_NAME']);

// Tags a form to record an event when it is submitted.
_kmq.push(['trackSubmit', 'AN_ELEMENT_ID_OR_CLASS', 'EVENT_NAME']);