feat(README): add directory tutorial

README.md

@@ -317,6 +317,7 @@ curl -X POST http://127.0.0.1:4001/v2/keys/queue -d value=Job2
 
 [lockmod]: #lock
 
+
 ### Using a directory TTL
 
 Like keys, directories in etcd can be set to expire after a specified number of seconds.
@@ -446,6 +447,27 @@ The response should be
 
 We successfully changed the value from "one" to "two" since we gave the correct previous value.
 
+### Creating Directories
+
+In most cases directories for a key are automatically created.
+But, there are cases where you will want to create a directory or remove one.
+
+Creating a directory is just like a key only you cannot provide a value and must add the `dir=true` parameter.
+
+```sh
+curl -L http://127.0.0.1:4001/v2/keys/dir -XPUT -d dir=true
+```
+```json
+{
+    "action": "set",
+    "node": {
+        "createdIndex": 30,
+        "dir": true,
+        "key": "/dir",
+        "modifiedIndex": 30
+    }
+}
+```
 
 ### Listing a directory
 
@@ -533,14 +555,31 @@ curl -L http://127.0.0.1:4001/v2/keys/?recursive=true
 ```
 
 
-### Deleting a directory
+### Deleting a Directory
 
 Now let's try to delete the directory `/foo_dir`.
 
-To delete a directory, we must add `recursive=true`.
+You can remove an empty directory using the `DELETE` verb and the `dir=true` parameter.
 
 ```sh
-curl -L http://127.0.0.1:4001/v2/keys/foo_dir?recursive=true -XDELETE
+curl -L -X DELETE 'http://127.0.0.1:4001/v2/keys/dir?dir=true'
+```
+```json
+{
+    "action": "delete",
+    "node": {
+        "createdIndex": 30,
+        "dir": true,
+        "key": "/dir",
+        "modifiedIndex": 31
+    }
+}
+```
+
+To delete a directory that holds keys, you must add `recursive=true`.
+
+```sh
+curl -L http://127.0.0.1:4001/v2/keys/dir?recursive=true -XDELETE
 ```
 
 ```json
@@ -549,7 +588,7 @@ curl -L http://127.0.0.1:4001/v2/keys/foo_dir?recursive=true -XDELETE
     "node": {
         "createdIndex": 10,
         "dir": true,
-        "key": "/foo_dir",
+        "key": "/dir",
         "modifiedIndex": 11
     }
 }