add static_pages home, help, about, and its controller
add rpsec test file
Merge branch 'static-pages' of github.com:alberthu16/sample_app into static-pages

Conflicts:
	app/controllers/static_pages_controller.rb
	app/views/static_pages/help.html.erb
	app/views/static_pages/home.html.erb
	spec/requests/static_pages_spec.rb