added a test taking view in user folder
added conditional links to home page for 'teach' and 'learn'
added profile conditional link to all pages
fixed typo that prevent user from reaching profile via the profile link on the course view page
lesson editor is finished on the backend
fixed error in test jade and create a test view folder
Merge branch 'student' into dev

fixed error in jade files and created a tests view folder
can add new test questions