small but important bug fix on the course payment page

git-svn-id: https://plugins.svn.wordpress.org/namaste-lms/trunk@822494 b8457f37-d9ea-0310-8a92-e5e31aec5664
- Added arguments that let you control the order of lessons in [namaste-course-lessons] shortcode

git-svn-id: https://plugins.svn.wordpress.org/namaste-lms/trunk@822515 b8457f37-d9ea-0310-8a92-e5e31aec5664
- "Accept file upload as solution" is finally implemented

git-svn-id: https://plugins.svn.wordpress.org/namaste-lms/trunk@823095 b8457f37-d9ea-0310-8a92-e5e31aec5664
allow student see their solution

git-svn-id: https://plugins.svn.wordpress.org/namaste-lms/trunk@823192 b8457f37-d9ea-0310-8a92-e5e31aec5664
fixed problems with PDFs and other large files when uploading solution to assignment

git-svn-id: https://plugins.svn.wordpress.org/namaste-lms/trunk@824037 b8457f37-d9ea-0310-8a92-e5e31aec5664