All sites add button.

[ADDED]     An add site button in the all sites VC.
New element fix and statusbar experimentation.

[FIXED]     Set lastUsed when creating a new site since elements can't
            be saved without that value set.
[UPDATED]   Configuration for tinting of status bar.
            Doesn't work yet with the custom navbar container image:
            Should check if last row of that image's pixels isn't too
            dark.  iOS 6 apparently averages it for the tint color.