imporves typography and typography implimentation

lms/static/sass/_about.scss

lms/static/sass/_base.scss

lms/static/sass/_base_animations.scss

lms/static/sass/_course_info.scss

lms/static/sass/_dashboard.scss

lms/static/sass/_find_courses.scss

lms/static/sass/_index.scss

lms/static/sass/_jobs.scss

lms/static/sass/_shared_course_filter.scss

lms/static/sass/_shared_footer.scss

lms/static/sass/_shared_forms.scss

lms/static/sass/_shared_header.scss

lms/static/sass/_shared_list_of_courses.scss

lms/static/sass/_shared_modal.scss

lms/static/sass/application.css

lms/templates/course.html

lms/templates/courses.html

lms/templates/dashboard.html

lms/templates/index.html

lms/templates/jobs.html