Added Readme file

Author: bassarisse

README.md

@@ -0,0 +1,9 @@
+# CSS Color Shifter
+
+Tool to consistently change CSS colors from a stylesheet or raw text
+
+See it in action: https://bassarisse.github.io/css-color-shifter/
+
+## TO-DO
+
+- Actually fill the Readme file!