XTEC2 theme: Added as a Submodule
OpenUniv: Drag and drop question types from OpenUniversity (gapselect, ddimageortext, ddmarker and ddwtos)
Lang: Added as a Submodule
Lang: Settings to change the language pack directory
GoogleOauth2: Add button on login block and login page
GoogleOauth2: Added as a Submodule
MDL-48430 custom_menu: Malformed url in custom menu cannot break the platform
Oauth Server: Added as a Submodule
Advices: Added as a submodule
Agora: Added as a Submodule
Bigdata Added as a Submodule
CourseQuotas: Added as a Submodule
MDL-43462 assignfeedback_editpdf: fix display of landscape PDFs

The size of the drawing canvas is now set from the size of the generated page image, with automatic
scrolling if it is too wide to display
Absolutely-positioned nodes (comments + stamps) are repositioned as the drawing canvas is scrolled

Conflicts:
	mod/assign/feedback/editpdf/yui/build/moodle-assignfeedback_editpdf-editor/moodle-assignfeedback_editpdf-editor-min.js