Major bug fixes:
1) Fixed bug in `UIImageView+ALImageWithURL` where the image was being lost because it wasn't being created from the location until after being dispatched to main
2) Fixed bug in `ALTableViewCellFactory` to allow sizing cells to be created from storyboard dynamic cells (previously, only checked it's `sizingCellDict` set from `init`... now adds new sizing cell if needed from dequeuing from table view.
3) Removed lingering references to `UIView+ALRefreshFont`, which were causing tests not to build

Minor bug fixes:
1) Fixed constraint issues in `ALMenuCell` -- image view height constraints now "optional" but strongly desired (priority == 999)
2) Fixed few broken tests due to multithreading fix related to "Major bug fixes (1)" above

Demo changes:
1) Added `CircularImageView` and custom cell subclass of `ALImageCell` in the storyboard from `TableViewController`