Create README.md

Working through different challenges ! 

next_train.rb: Asks user to enter a decimal number for time, then selects the train to leave. If next train is at 12 a song will be printed

mailing_list.rb: printing out the address of each person nicely
mailing_list_2.rb: printing the address nicely with Mr & Mrs if applicable

game_data: print in a way that Patriots win