Update xmas.rb

Pardon, m'ero scordato lo shebang!
Merry Christmas!
Crypto Greetings
Merge pull request #8 from danitrap/patch-1

Update xmas.rb
Merge pull request #9 from Shaps/master

Merry Christmas!
Merge pull request #10 from fabiociotoli/master

Crypto Greetings