Correct Readme.md#theming
Correct Readme.md#theming

Theming/sky.css has dark gray text on light blue background; not white text
leesdolphin/language-punctuation,kayakr/ndf2015,leesdolphin/why-python-is-awesome,leesdolphin/language-punctuation,kayakr/ndf2015,leesdolphin/language-punctuation,leesdolphin/why-python-is-awesome,leesdolphin/why-python-is-awesome,kayakr/ndf2015