pull nav drawer to GdgNavDrawerActivity
add navigation drawer to pulse and gdl, move about and settings to action bar
fix NPE
pull nav drawer to GdgNavDrawerActivity
add navigation drawer to pulse and gdl, move about and settings to action bar
rebase master
Merge pull request #59 from gdg-x/navigation2

Add navigation drawer to pulse and gdl, move settings, about to action bar menu