Add linked_list.

Author: trekhleb

.babelrc

@@ -0,0 +1,11 @@
+{
+  "presets": [
+    [
+      "env", {
+        "targets": {
+          "node": "current"
+        }
+      }
+    ]
+  ]
+}

.editorconfig

@@ -0,0 +1,8 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8
+indent_style = space
+indent_size = 2

.gitignore

@@ -1 +1,3 @@
+node_modules
+build
 .idea

README.md

@@ -1 +1,5 @@
 # Data Structures
+
+```
+npm run babel-node --silent ./src/linked_list
+```