Nyan-Mode 1.1.3

Merge pull request TeMPOraL#33 from purcell/patch-1

Add missing defcustom :type specs

Added #'nyan-toggle-wavy-trail.

Manually setting this variable was kinda annoying.

Minor README tweaks.

Added info about the minimum-window-width.

In case people might get surprised by it...

Version number bump.

Turning everything into proper first release.