Update readme

Author: DonJayamanne

README.md

@@ -1,9 +1,28 @@
-# typescript-notebook README
+# TypeScript for Jupyter Notebooks
 
+A [Visual Studio Code](https://code.visualstudio.com/) extension required to get started with TypeScript in Jupyter notebooks.
+This extension will automatically install the necessary dependencies required to use TypeScript with [Jupyter Extension](https://marketplace.visualstudio.com/items?itemName=ms-toolsai.jupyter).
+
+### Quick Start
+
+-   **Step 1.** Install the [TypeScript Notebook Extension](https://marketplace.visualstudio.com/items?itemName=donjayamanne.typescript-notebook)
+-   **Step 2.** Open or create a notebook file and start coding!
+-   **Step 3.** Select the `TypeScript` kernel from the [command palette](https://code.visualstudio.com/docs/getstarted/userinterface#_command-palette) `Notebook: Select Kernel`
+
+![QuickStart](https://raw.githubusercontent.com/DonJayamanne/typescript-notebook/master/resources/quickstart.gif)
 
-## Release Notes
 
-Users appreciate release notes as you update your extension.
+## Prerequisite
+* [Jupyter extension](https://marketplace.visualstudio.com/items?itemName=ms-toolsai.jupyter)
+* [npm](https://www.npmjs.com/get-npm)
+
+## TypeScript Kernel
+* [tslab](https://github.com/yunabe/tslab) is used as the kernel for Jupyter Notebooks.
+* Installing the `tslab` kernel for Jupyter Notebooks requires one to have Python & Jupyter installed.
+	* However the [Jupyter extension](https://marketplace.visualstudio.com/items?itemName=ms-toolsai.jupyter) does not require either one of these (in a majority of the case).
+	* This extension gets around the requirement of having to install Python & Jupyter.
+
+## Release Notes
 
 ### 1.0.0