Hello,

Attached is a simple patch that adds {+-}90 degree rotation to image
mode as requested in [1].

Any comments welcome.

[1]: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=560

2014-10-10  Matthew Leach  <matthew@mattleach.net>

	* image-mode.el (image-mode-map): map 'r' and 'l' to rotation
	functions.
	(image-rotate-90-right): New method.
	(image-rotate-90-left):