Add editor config files

Author: bdukes

.editorconfig

@@ -0,0 +1,15 @@
+# http://editorconfig.org
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.md]
+trim_trailing_whitespace = false
+
+[*.elm]
+end_of_line = lf

prettier.config.js

@@ -0,0 +1,10 @@
+/* eslint-env node*/
+'use strict';
+
+module.exports = {
+	printWidth: 80,
+	useTabs: true,
+	tabWidth: 4,
+	trailingComma: 'es5',
+	singleQuote: true,
+};