Git commits in Moodle 2.8.4 by Marina Glancy

commit 9c6dab862a35ced6134368562867ad455ce9466b
Author: Marina Glancy <marina@moodle.com>
Date:   Fri, 06 Feb 2015 12:42:10 +0800
Tag:    v2.8.4

MDL-47558 resource: allow to edit module without being redirected

commit 0a976df90c79a997fa9d259d0945f43386d17d20
Author: Marina Glancy <marina@moodle.com>
Date:   Tue, 03 Feb 2015 10:37:42 +0800
Tag:    v2.8.4

MDL-49003 login: prevent signup when user is logged in

commit 4ab4ec652cb7768a058eca7f69362e76d9ee0c62
Author: Marina Glancy <marina@moodle.com>
Date:   Tue, 13 Jan 2015 10:43:34 +0800
Tag:    v2.8.4

MDL-48804 core: do not set current course until login validated

commit 054609f8b041b1ea2c740af527a03d8f2509d70b
Author: Marina Glancy <marina@moodle.com>
Date:   Mon, 12 Jan 2015 16:16:14 +0800
Tag:    v2.8.4

MDL-48794 report_log: make sure y-axis gridlines in graphs are integers