docs improvement

Author: calumk

readme.md

@@ -32,17 +32,33 @@ It was built to be an improvement on :
 
 ---
 
-# Technical Info 
+## Installation / use
+
+```javascript
+import EditorJS from '@editorjs/editorjs';
+import editorjsCodeflask from '@calumk/editorjs-codeflask';
+
+var editor = EditorJS({
+  // ...
+  tools: {
+    ...
+    code : editorjsCodeflask
+  },
+});
+```
+
 
 ## Data Format
 The data imported/exported from the block is as follows:
 
-| Name            | Description                                                |
-| --------------- | ---------------------------------------------------------- |
-| code            | The code that is displayed in the editor, with line breaks |
-| language        | The programming language                                   |
-| showlinenumbers | Will show/hide the line numbers (Default true) (WIP - [Codeflask #132](https://github.com/kazzkiq/CodeFlask/issues/132))                          |
+| Name                       | Description                                                                                                              |
+| -------------------------- | ------------------------------------------------------------------------------------------------------------------------ |
+| code                       | The code that is displayed in the editor, with line breaks                                                               |
+| language (optional)        | The programming language                                                                                                 |
+| showlinenumbers (optional) | Will show/hide the line numbers (Default true) (WIP - [Codeflask #132](https://github.com/kazzkiq/CodeFlask/issues/132)) |
+
 
+Since language and linenumbers are optional, existing ```code``` blocks can safley use this plugin