Fix crash and weirdness when deleting the last site
Better abstraction for number of sites
Merge pull request #557 from wordpress-mobile/issue/555-delete-blog

Fix site deletion
Log remote errors on NUX
Merge branch 'develop' of github.com:wordpress-mobile/WordPress-iOS into develop
Don't animate welcome screen.

If it's animated, the underneath controller shows briefly on first
launch
Merge pull request #569 from wordpress-mobile/feature/smooth-first-launch

Don't animate welcome screen.
Merge branch 'develop' into issues/553