Only execute stuff when file is executed itself
display_hangman now also returns the hangman string for better testing possibility
rspec für hangman
First few testcases for roman numbers
Added file roman.rb
test for roman and roman
Refactored specs
Added testcase for integer to RomanNumber conversion and refactored other testcases to use to_r
Created method to_r in integer class
Merge branch 'devel'