Use jQuery 2.0.3 if supported.

Not necessary, but jQuery 1 does feature detection that
uses inline scripts -- to evaluate support early.

This then invokes notices in Firefox if sandboxing is
turned on. This alto doesn't really matter since they
are notices.

Our codebase is relatively simple, so using either versions
is okay - for now. If we ever run into issue we can just
use 1.x, since these are just notices.