nsqadmin: dont allow the href event click to execute
nsqd: separate diskqueue close from deletion
Merge pull request #200 from mreiferson/js_200

nsqadmin: fix lookupd conns javascript event triggering
Merge pull request #201 from mreiferson/diskqueue_delete_201

nsqd: diskqueue close (when deleting) still leaves metadata file
bump to 0.2.20 stable