Work on glueck.
Added glueck crossword puzzle.
Merge branch 'master' of https://github.com/Rostu/elearning
Changed route for glueck.
Removed anchor reference.
Created glueck cross word puzzle
Added glueck js files.
Change of button text on click.
Created glueck landing page.
Changed flow of tasks in glueck.
Added glueck task chooser background.
Updated glueck css.
Modified cross word puzzle validation.
Updated cross word css.
Updated cross word logic.