no-jira: feedback, update QTI test after closing the editor, description not mandatory on copy, footer url in the middle text, double icons in passed / failed line of the details page of a course...

OO-1343: add three different style choices to catalog, refactor the catalog admin, refactor the image pipeline of the catalog to reduce the number of scaling

	OO-1253: not assessable nodes and not published nodes return a score of 0.0 instead of the large negative number. If not assessed, no score seems logic but not a large negative value

- fixed a silly use of Autowired
- added missing wording

OO-1254: add a "not dummy" template, ensure temporary directory is created for the preview, a date to date handler and not a string

OO-1316: group coach have the same rights as course coaches to access assessment tool and test statistics

OO-1254: more browser friendly links for download, can delete the certificates, format and orientation for template, inline efficiency statement in course...

OO-1308: standard alignment for password, fix small placement issue of multi-columns vertical checkbox

OO-1310: add start button for guest user in course list and details if the course is set as BARG, remove assessment informations on the root node of the course for guest, add download button for guest in folder

OO-1257: implement REST API for efficiency statement and certificate, standalone or linked to a resource

OO-1254: add a renderer based on PhantomJS and velocity template, check the zip package for index.html, check the PDF to be compatible...