Developer credits

Git commits in Moodle x.x.x by Viduranga Wijesooriya

commit 5ae7cc62559cefbefcc49ca54cc30dad5966203d
Author: Viduranga Wijesooriya <vpowerrc@gmail.com>
Date:   Thu, 26 Mar 2015 03:33:45 +0800
Tag:    v2.7.8

MDL-49477 availability_grade-form: checkbox disable problem fixed

commit cfd867e7d91c377d38e34127b33a3ecdfbaf0490
Author: Viduranga Wijesooriya <vpowerrc@gmail.com>
Date:   Thu, 26 Mar 2015 03:33:45 +0800
Tag:    v2.8.6

MDL-49477 availability_grade-form: checkbox disable problem fixed

commit 21e6aabce9ce9e59d512dd8e899c05042cb41185
Author: Viduranga Wijesooriya <vpowerrc@gmail.com>
Date:   Thu, 26 Mar 2015 03:33:45 +0800
Tag:    v2.9.0-rc1

MDL-49477 availability_grade-form: checkbox disable problem fixed