More Area features (#168)

* Add scrolling area

* Gradients

* Fix typo and add scrolling to area docs

* Implement imperative gradient api

As per discussion in #130

* Fix links in area documentation

* Update example for area gradients

* Add docs for new gradient api

* Format all docs with prettier

* Really fix docs hyperlinks

* Added to docs: ignore ...opacity for gradients

docs/methods/dialog.md

@@ -11,8 +11,8 @@ class Example extends Component {
   render() {
     return (
       <App>
-        <Window title="Example" size={{w: 500, h: 500}}>
-            <TextInput onChange={() => Dialog('Error', {title: "Message"})}/>
+        <Window title="Example" size={{ w: 500, h: 500 }}>
+          <TextInput onChange={() => Dialog('Error', { title: 'Message' })} />
         </Window>
       </App>
     );
@@ -38,14 +38,14 @@ What type the dialog is. The current types are:
 - Open - open a file
 - Save - save a file
 
-| **Type** | **Required** |
-| --- | --- |
-| enum('Message', 'Error', 'Open', 'Save') | Yes |
+| **Type**                                 | **Required** |
+| ---------------------------------------- | ------------ |
+| enum('Message', 'Error', 'Open', 'Save') | Yes          |
 
 ### options
 
 Options for the title and description if it is a Message or Error.
 
-| **Type** | **Required** |
-| --- | --- |
+| **Type**                             | **Required**                    |
+| ------------------------------------ | ------------------------------- |
 | {title: string, description: string} | One (if it is Message or Error) |