* commit 'f151391b72b5ab667ea0681de5bd2fbe0d94d8a9': fix markup errors in action bar styling, add more information about using drawables, move 'managing the activity lifecycle' down a notch, because it's less interesting.
* commit 'f151391b72b5ab667ea0681de5bd2fbe0d94d8a9': fix markup errors in action bar styling, add more information about using drawables, move 'managing the activity lifecycle' down a notch, because it's less interesting.