Fauxton: use .listenTo and not .on
Fauxton: use .listenTo and not .on

There was no `.off` call on destroy, so these two Eventhandlers
where leaking memory

popojargo/couchdb-fauxton,popojargo/couchdb-fauxton,cloudant/couchdb-fauxton,robertkowalski/couchdb-fauxton,apache/couchdb-fauxton,robertkowalski/couchdb-fauxton,garrensmith/couchdb-fauxton,apache/couchdb-fauxton,cloudant/couchdb-fauxton,garrensmith/couchdb-fauxton,michellephung/couchdb-fauxton,benkeen/couchdb-fauxton,benkeen/couchdb-fauxton,michellephung/couchdb-fauxton,benkeen/couchdb-fauxton,robertkowalski/couchdb-fauxton,popojargo/couchdb-fauxton,michellephung/couchdb-fauxton,cloudant/couchdb-fauxton,michellephung/couchdb-fauxton,popojargo/couchdb-fauxton,michellephung/couchdb-fauxton,apache/couchdb-fauxton,cloudant/couchdb-fauxton,apache/couchdb-fauxton,robertkowalski/couchdb-fauxton,garrensmith/couchdb-fauxton,garrensmith/couchdb-fauxton