Require at least RSpec 3
Remove index.html files, they’re too hard to read
Update hello_spec.rb to use new syntax
Update temperature_spec.rb to use new syntax
Update rspec syntax for calculator_spec.rb
Update simon_says_spec.rb to new Rspec syntax
Update pig_latin_spec.rb to new Rspec syntax
Update silly_blocks_spec.rb to new Rspec syntax
Update hello_friend_spec.rb to new Rspec syntax