Adding config files for editor, lint and git

.editorconfig

+# Unix-style newlines with a newline ending every file
+[*]
+indent_style = space
+indent_size = 2
+insert_final_newline = true

.gitignore

-# ignore install nodejs modules
+# Ignore compiled files.
+dist
+vendor
+
+# Pattern Lab (ignored initially)
+pattern-lab
+**/bem.function.php
+
+# Twig helper functions
+**/add_attributes.function.php
+**/bem.function.php
+
+# NPM
 node_modules
-gulpfile-m.js
-gulpfile-sr.js
-.sass-cache
-rwd1.terminal
\ No newline at end of file
+npm-debug.log
+
+# Git deploy
+.publish
+
+.DS_Store
+
+# theme setup file
+local.gulp-config.js
+
+# yarn lock file
+yarn.lock

.stylelintrc

+{
+  "extends": "stylelint-config-standard",
+  "rules": {
+    "at-rule-no-unknown": [ true, {
+      "ignoreAtRules": [
+        "include",
+        "mixin",
+        "extend",
+        "if",
+        "each",
+        "content"
+      ]
+    }]
+  }
+}