Git commits in Moodle 2.2.6 by Charles Fulton

commit 5559703a2342e118088177c40aefaeeee3574d13
Author: Charles Fulton <mackensen@gmail.com>
Date:   Thu, 18 Oct 2012 02:07:12 +0800
Tag:    v2.2.6

MDL-36105 grades: use consistent icon classs


commit 35cc173d46ff4be0c06eb0b414a46398496e1128
Author: Charles Fulton <mackensen@gmail.com>
Date:   Tue, 11 Sep 2012 03:31:39 +0800
Tag:    v2.2.6

MDL-32230 block_rss_client: remove extra cleaning step


commit 7f649757b5a102949376f5068e96234b9e88c529
Author: Charles Fulton <mackensen@gmail.com>
Date:   Thu, 28 Jun 2012 21:11:32 +0800
Tag:    v2.2.6

MDL-32712 assignment: convert default format value during upgrade