JDF-659 Fix MSIE9 error in HTML5 form validation.

We defer to server-side validation, in browsers where HTML5 Form
Validation is not supported, like MSIE 9.
JDF-660 Fix for member collection sync in MSIE

The Backbone Collection.fetch API call is now configured to
add a timestamp value to the URL. This prevents MSIE from caching
the first response and reusing it despite a stale cache entry.