Git commits in Moodle 2.5.2 by Russell Smith

commit 1627ea320a5f283052e7e69359eba73ac4589897
Author: Russell Smith <mr-russ@smith2001.net>
Date:   Mon, 19 Aug 2013 18:18:57 +0800
Tag:    v2.5.2

MDL-41291 cache: Use fread to avoid race conditions


commit a49e900fdac42e5dfe84c71f415af52caa7e8359
Author: Russell Smith <mr-russ@smith2001.net>
Date:   Tue, 30 Jul 2013 14:00:57 +0800
Tag:    v2.5.2

MDL-40893 backup: cache question answers for performance


commit 874d5a4f856f5e2a0366a4f421955106c6f03d5d
Author: Russell Smith <mr-russ@smith2001.net>
Date:   Sat, 20 Jul 2013 12:03:45 +0800
Tag:    v2.5.2

MDL-40793 profiling: Allow multiple reference runs in display


commit 619fc0cd3c01af69d6f9ccf25a932b992f15e3cb
Author: Russell Smith <mr-russ@smith2001.net>
Date:   Thu, 11 Jul 2013 15:14:46 +0800
Tag:    v2.5.2

MDL-40585 backup: cache XML parent paths


commit d51121efbe11b8bf1d8092a023cc2216f00ed13f
Author: Russell Smith <mr-russ@smith2001.net>
Date:   Tue, 09 Jul 2013 18:04:09 +0800
Tag:    v2.5.2

MDL-40584 backup: Query db once per category in precheck


commit 30967ff481610efc9823a21cf2ddfb0464a24b10
Author: Russell Smith <mr-russ@smith2001.net>
Date:   Tue, 09 Jul 2013 08:10:17 +0800
Tag:    v2.5.2

MDL-40538 caching: Use isset for performance