Add a README

README.md

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+Overview
+--------
+
+ansicolors is a simple Lua module for printing to the console
+in color.
+
+I hope to integrate this module with others into a luaterm
+distribution sometime in the near future.
+
+Installation
+------------
+
+It's pure Lua, so just put ansicolors.lua somewhere where your
+Lua interpreter will be able to find it.
+
+Usage
+-----
+
+    local colors = require 'ansicolors'
+    print(color.red 'hello')
+    print(color.red .. 'hello' .. color.reset)
+    print(color.red, 'hello', color.reset)