added icons e make messages works outside admin
Merge branch 'master' into course-header-3646
show reports outside admin
Merge branch 'master' into course-header-3646

Conflicts:
	themes/default/templates/administration/stats.html
refactor template tag name and check if user is admin
fix zero division and no attribute erros
make reports and messages work inside and outside course admin
show incons in course intro
change classes link position