Fix SQL injection threats and replace SESSION variable with api_get_user_id - refs #7272
Minor - Update PHPDoc
Fix warning messages. Add formula notation. Now picks random float values even if edge values seem integers (like 10.00 or 20.0)
Add REST web service for get personal messages - refs #7338
Minor - format code.
Preventing inserting 2 documents in the same course with the same name.

See BT#8852
Minor - format code.
Minor - format code.
Minor - format code, replacing global $_user,
Fixing suspend_data, launch_data and lesson_location see BT#8898
Minor - format code.
Minor - format code.
Merge branch '1.9.x' into 7296
Fix broken div in social network - refs #7336
Count the messages from the last received message - refs #7338
Minor - Update PHPDoc - refs #7338
Get messages data from the last received message - refs #7338
Minor - Update PHPDoc - refs #7338
Generate api keys - refs #7338
Fix how to get the new messages - resf #7338