Add paginator to courses page
Made some reworking works with other page

	modified:   courses/views.py
	modified:   database
	modified:   editor/views.py
	modified:   grant/urls.py
	modified:   media/js/scripts.js
	modified:   plan/models.py
	modified:   specialty/views.py
	modified:   templates/courses/edit.html
	modified:   templates/courses/index.html
	modified:   templates/editor/index.html
	modified:   templates/index.html
	modified:   templates/plan/edit.html
	modified:   templates/plan/index.html
	modified:   templates/professors/edit.html
	modified:   templates/professors/index.html
	modified:   templates/specialty/edit.html