Added jquery/sizzle locator tests.

Simple tests for jquery/sizzle locator, built from the existing links
and tables tests.  Includes moving the previous commit's tests to
the sizzle suite, so that only one suite will fail if jquery cannot be
loaded.

I believe that the tests can be marked non-critical, which might be a
good thing since they can fail if jquery cannot be downloaded.  I'll
look into this soon.