Git commits in Moodle 2.1.2 by Tony Levi

commit 716f93efdb71bd8bc7595bfebec8f92893b00333
Author: Tony Levi <tony.levi@netspot.com.au>
Date:   Thu, 11 Aug 2011 13:04:54 +0800
Tag:    v2.1.2

MDL-28709: Performance: Send cache/contenttype headers with 304 responses

commit 68d9daa1876680e03571554423f61ff721aa69e9
Author: Tony Levi <tony.levi@netspot.com.au>
Date:   Thu, 11 Aug 2011 12:34:36 +0800
Tag:    v2.1.2

MDL-28708: Send 304 Not Modified response when browser If-Modified-Since header is after file mtime

commit a3ad8fd8832893eeb762bbd107561ca8ca21146b
Author: Tony Levi <tony.levi@netspot.com.au>
Date:   Mon, 18 Apr 2011 12:30:36 +0800
Tag:    v2.1.2

MDL-27228: Fix label 'eye' does not match show/hide setting

commit 5c5cb085c0b42f9b8cb3a7674e84246baecca036
Author: Tony Levi <tony.levi@netspot.com.au>
Date:   Thu, 31 Mar 2011 13:36:13 +0800
Tag:    v2.1.2

MDL-27030: Fix quiz overview report showing incorrect grades on regraded attempts