Revert "removed extra files in other folders not needed"

This reverts commit d59002d8b11b6d206966f45ca08ac8e8a9de48e3.
Merge branch 'master' of https://github.com/Tracy-Tra/wdim351-curriculum
Add an author/email comment
Moved hello.rb to lib
Added a Rakefile (whatever that is)
Added README (and may I add that it's a pain to save files with no extension
Made interactive