Notification of string changes

Author: Mikel Martín
MDL-83896 mod_lesson: Add course overview integration
- Implement course overview integration
- Redirect index.php to course overview


http://git.moodle.org/gw?p=moodle.git;a=commit;h=ce3eb175af36adfa77ef91bd50f2363d45a6839a
http://github.com/moodle/moodle/commit/ce3eb175af36adfa77ef91bd50f2363d45a6839a

+ 5.1 en [allowedattempts,mod_lesson]
+ 5.1 en [averageattempts,mod_lesson]
+ 5.1 en [duedate,mod_lesson]
+ 5.1 en [retakesallowedinfo,mod_lesson]
+ 5.1 en [studentswhoattempted,mod_lesson]
+ 5.1 en [totalattepmts,mod_lesson]
+ 5.1 en [view,mod_lesson]