Created Viewing and Creating Lessons Page

Setting up pages for viewing and creating a lesson. Test by running locally.

* Modified app/views/layouts/application.html.erb to contain common code
* Added routes for create_lesson and lesson in config/routes.rb
* Added app/views/static/create_lesson.html.erb and app/views/static/lesson.html.erb
* Added necessary asset files (JS and CSS)
* Modified asset pipeline to not include everything in every file contained in assets folder (app/assets/javascripts/application.js and app/assets/stylesheets/application.css)

* Creating and Viewing Lesson functionality