Git commits in Moodle 2.8.7 by David Mudrák

commit 1d19a5eb47ca01b910f5af6d3d5cefdafc6d4057
Author: David Mudrák <david@moodle.com>
Date:   Mon, 08 Jun 2015 17:04:04 +0800
Tag:    v2.8.7

MDL-50509 datalib: Fix the typo in the variable name

commit 2daaae15ea5aa886cb2c700e076231b288db292d
Author: David Mudrák <david@moodle.com>
Date:   Thu, 21 May 2015 23:18:05 +0800
Tag:    v2.8.7

MDL-50318 course: Fix the URL of embedded images at resources overview

commit 5157d7e013e14de3ad4cefc8b93b69bbbfa14a6f
Author: David Mudrák <david@moodle.com>
Date:   Thu, 21 May 2015 20:03:59 +0800
Tag:    v2.8.7

MDL-50313 docs: Fix the documentation for the FEATURE_IDNUMBER constant