OpenLayers 2.11 (added more files and directories)

Hi, I have updated the openlayers-2.11 library, currently there is only one file OpenLayers.js in cdnjs, but the directories img theme and lib are needed to make the library work as indicated in the readme.txt file. (https://github.com/openlayers/openlayers/blob/release-2.11/readme.txt)

Downloaded the original files from: http://www.openlayers.org/download/OpenLayers-2.11.tar.gz
Also available at GitHub: https://github.com/openlayers/openlayers/tree/release-2.11