MDL-43319 phpdoc: fix too much ham consumption by developers
MDL-45342 book: Automate MDLQA-2423 - A teacher can create book chapters and subchapters
MDL-44174 theme_clean: Updating information in readme file
MDL-34904 lti: Fix notice while using lti in frontpage
Merge branch 'MDL-44174-25' of git://github.com/FMCorz/moodle into MOODLE_25_STABLE
Merge branch 'MDL-45342-25' of git://github.com/ankitagarwal/moodle into MOODLE_25_STABLE
Merge branch 'MDL-43319-25' of git://github.com/danpoltawski/moodle into MOODLE_25_STABLE
Merge branch 'MDL-34904-25' of git://github.com/ankitagarwal/moodle into MOODLE_25_STABLE