Merge branch 'release/0.5.0'

.gitignore

Gemfile

Gemfile.lock

Guardfile

app/assets/stylesheets/application.scss

app/assets/stylesheets/bootstrap.css

app/assets/stylesheets/choices.scss

app/assets/stylesheets/codemirror.css

app/assets/stylesheets/console.css

app/assets/stylesheets/graph2D.component.scss

app/assets/stylesheets/graph3D.component.scss

app/assets/stylesheets/hints.css

app/assets/stylesheets/matefun.scss

app/assets/stylesheets/matefun_ide.scss

app/controllers/admin_controller.rb

app/controllers/answers_controller.rb

app/controllers/application_controller.rb

app/controllers/concerns/publications_controller_concern.rb

app/controllers/concerns/recaptcha_controller_concern.rb

app/controllers/grades_controller.rb