Version 1.0.4 - On the 23rd Day of Christmas

Very very very belatedly accepting two Pull Requests:

• Thank you @chriscoyier for giving Nutshell better accessibility, and making the close button an actual <button>! (and thanks to everyone else who brought up accessibility issues in #19 )
• Thank you @asandikci for the Turkish translation!

Sorry I'm very slow with accepting PRs, and thank you two again!