Hot sorry

Fotorama 4.6.0 broke image fitting into stage (#286, #291, and many more in inbox). This release fixes that.

Some new features, meanwhile:

• New enableifsingleframe option. Default value is false. Set it to true if you don’t want to disable fotorama navigation when it has only one frame.
• Smarter autoplay. Now waits until the next frame is fully loaded.