Bugfixes

The workaround to fix #31 change focusing behavior and it's not perfect: it introduces something I really dislike: edit content (keyboard and formatting bar show up) then scroll: the contentText lose focus.

So I propose to:
* keep this behavior + autodismiss keyboard when contentText focus is lost
* or don't merge commit c6841eb and keep previous behavior - I prefer this solution

Other ideas for another kind of workaround are welcome.

commit c30d056 fixes #32 and commit 2bbd0d3 fixes an unreported NPE I discovered by adding a "subscriber" user to my test blog and making this user write a draft.