Purge Huffington Post from Yahoo News feed

Eliminates Huffington Post Entries from Yahoo News list. Will run through iterative cycles to continue cleaning up the page as more are loaded.

v1.3 2016-04-21 Making a fix due to new Yahoo layout. Also added new sites to eliminate as well that are of equal garbage: Vox and Think"Progress"
v1.2 2014-11-22 Forgot to remove debugging statements. Whoops.
v1.1 2014-11-22 Updated the script to use pure Javascript instead of JQuery. Originally would work fine on tampermonkey but not greasemonkey.
v1.0 2014-09-30