OO-2732 beautify d&d question type, use color coding and border styles to distinguish between source and target

OO-2784 optimize sections, add item id (hidden), compile offline files for download, beautify coach comment

OO-2732: implement a matchInteraction with drag and drop (fallback to click possible) with slightly enhanced editor and word export

OO-2756	: add progress bar and percent value for score, add section summary for the questions correct, answered, and not answered

OO-2649: fix behavior of associateInteraction with unlimited associations, fix reload issue where the old answer is not correctly loaded...

OO-2583: implement maximum time limit for assessmentTest and allow the test course element to override it

OO-2579: guess if the modal feedback come from our editor and if yes, decorate them with a CSS class

OO-2368: better handle the behavior of the paint app if the mouse go out of the canvas, prevent IE to drag the background image which breaks the paint app...

OO-1593: fix some rendering issues in QTI 2.1, allow admin to force reload the XML files from the disk, add css for prompt, remove some leading console.log

OO-1593: implements drawing interaction, fix in table search in assessment tool, fix statistics in course overview of the assessment tool...

OO-1593: adapt qtiworks to our way to work with essay,  fix feedback for hotspot and other small fixes

OO-1593: add more informations for unkown interaction in editor, add debug informations in the preview of the item's editor (for openolat question types and the others)...

OO-1593: use a composite id instead of the responseIdentifier in the GUI, this will allow to show the response of the user and the solution of the same interaction side by side