Update to fix filemanager when change folder name and breadcrumb url. Add logs to track_e_default -refs BT#8314

Conflicts:
	main/inc/lib/fckeditor/editor/plugins/ajaxfilemanager/ajax_create_folder.php
	main/inc/lib/fckeditor/editor/plugins/ajaxfilemanager/ajax_delete_file.php
	main/inc/lib/fckeditor/editor/plugins/ajaxfilemanager/ajax_file_copy.php
	main/inc/lib/fckeditor/editor/plugins/ajaxfilemanager/ajax_file_cut.php
	main/inc/lib/fckeditor/editor/plugins/ajaxfilemanager/ajax_file_upload.php
	main/inc/lib/fckeditor/editor/plugins/ajaxfilemanager/ajax_save_name.php
	main/inc/lib/main_api.lib.php
fix bug in course information's user list when multi url enabled
remove unused __file__ and __line__
changes for editing users by csv import -refs #6839
changes for editing users by csv import -refs #6839
Indentation -refs #6839
Add minor support for social wall - work in progress - refs #5637
Fix issue with student download of own work - refs BT#8151
update rapid installation documentation - refs BT#8441
Webservice to Convert from ppt to Leaning path - refs BT#8441
Add function documentation - refs BT#8441
changing invitation sender-refs #3702
fixing code when sending invitation -ref #3702
fixing code when sending invitation -ref #3702
user_update_import.php added
removing unnecessary code -refs #6839
Indentation -refs #6839
removing unnecessary code -refs #6839
Fix For delete links double \n in files.html
Comment Optional only for insert_tabs NOT for insert_link