Fix another NPE.

Catch the case where a user clicks follow faster than the user info
loading takes.
Also make view handling consistent between UserFragment and
RepositoryFragment.
Go to pushed branch/tag when clicking a create event.
Remove now pointless method indirection.

UiUtils.createDialogBuilder used to contain logic, but doesn't anymore;
hence this indirection is pointless and can be removed.
Added drone.io debug build to downloads
Merge branch 'drone-badge' of https://github.com/kageiit/gh4a