Fixing isotope plugin issues on the buzz page. DEVELOPER-663

A few things here:

1. Updated to isotope 2.0.0 - the height 0 was a known issue with the previous 1.5.x
2. Since we are calling isotope so often (everytime someone searches or the page loads, we need to do a teardown/destroy of the previous one when we are adding new elements.

Let this build and we can give it a shot. After the fixes I was unable to reproduce the error.