Generated the first rspec controller test

First rspec controller test has been generated in anticipation of further
coding work.
Overwritten current rspec file with generated one

Generated rspec file is now used instead of handwritten one. This should
be more reliable.
Modified the routes.rb file to properly route

The routing file, routes.rb, has been configured to properly map requests to
the welcome controller and associated action.
Added all relevant generated files

Files that have been generated from the rails generate command have been
added here. Also, the file index.html.erb has had slight modification to the
content of the <h1> tags.