add perf.js
use perf.js in settings
switch to using mozbrowserloadend event and clean up ttlview event binding code
update CSS for ttlview to not overlap with topbar icons
add perf.js to template app
update CSS for perf.js
add perf.js to a few more apps
add perf.js to homescreen and contacts
make sure text is black
make perf.js deferred here
add some log numbers from system
add more logs