add .editorconfig and .eslintrc from pattern-engines branch

.editorconfig

@@ -0,0 +1,11 @@
+# editorconfig.org
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+tab_width = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true

.eslintrc

@@ -0,0 +1,74 @@
+{
+  "env": {
+    "node": true,
+    "builtin": true
+  },
+  "globals": {},
+  "rules": {
+    "block-scoped-var": 2,
+    "camelcase": 0,
+    "curly": [
+      2,
+      "all"
+    ],
+    "dot-notation": [
+      1,
+      {
+        "allowKeywords": true
+      }
+    ],
+    "eqeqeq": [
+      2,
+      "allow-null"
+    ],
+    "global-strict": [
+      0,
+      "never"
+    ],
+    "guard-for-in": 2,
+    "key-spacing": [
+      0
+    ],
+    "new-cap": 0,
+    "no-bitwise": 2,
+    "no-caller": 2,
+    "no-cond-assign": [
+      2,
+      "except-parens"
+    ],
+    "no-debugger": 2,
+    "no-empty": 2,
+    "no-eval": 2,
+    "no-extend-native": 2,
+    "no-extra-parens": 0,
+    "no-irregular-whitespace": 1,
+    "no-iterator": 2,
+    "no-loop-func": 2,
+    "no-mixed-requires": 0,
+    "no-multi-str": 2,
+    "no-multi-spaces": 0,
+    "no-new": 2,
+    "no-proto": 2,
+    "no-script-url": 2,
+    "no-sequences": 2,
+    "no-shadow": 2,
+    "no-undef": 2,
+    "no-underscore-dangle": 1,
+    "no-unused-vars": 2,
+    "no-with": 2,
+    "quotes": [
+      0,
+      "single"
+    ],
+    "semi": [
+      0,
+      "never"
+    ],
+    "strict": 0,
+    "valid-typeof": 2,
+    "wrap-iife": [
+      2,
+      "inside"
+    ]
+  }
+}