Collapsible set: Added info and demo of corner styling to the docs.
Collapsible set: Added info and demo of corner styling to the docs.

hinaloe/jqm-demo-ja,hinaloe/jqm-demo-ja,hinaloe/jqm-demo-ja,arschmitz/uglymongrel-jquery-mobile,startxfr/jquery-mobile,arschmitz/jquery-mobile,arschmitz/jquery-mobile,startxfr/jquery-mobile,arschmitz/uglymongrel-jquery-mobile,arschmitz/uglymongrel-jquery-mobile,startxfr/jquery-mobile,arschmitz/jquery-mobile