master: added new-york theme
https://github.com/kathrynhough/get-your-code-on/commit/edb90f5b8bb1045f7ed0e6721d88da6ba3b40316
master: updated css
https://github.com/kathrynhough/get-your-code-on/commit/eaee7afe12bc415b1c81811db99caf439bc6b047