Update documentation

README.md

@@ -1,4 +1,98 @@
 # edu-signer-js
 [![Build Status](https://travis-ci.org/ronaldoaraujo/edu-signer-js.svg?branch=master)](https://travis-ci.org/ronaldoaraujo/edu-signer-js)
 [![Coverage Status](https://coveralls.io/repos/github/ronaldoaraujo/edu-signer-js/badge.svg?branch=master)](https://coveralls.io/github/ronaldoaraujo/edu-signer-js?branch=master)
+
 A javascript library for digital signature
+
+## Browser Support
+
+This library relies on [Fetch API](https://fetch.spec.whatwg.org/). And this API is supported in the following browsers.
+
+![Chrome](https://cloud.githubusercontent.com/assets/398893/3528328/23bc7bc4-078e-11e4-8752-ba2809bf5cce.png) | ![Firefox](https://cloud.githubusercontent.com/assets/398893/3528329/26283ab0-078e-11e4-84d4-db2cf1009953.png) | ![Opera](https://cloud.githubusercontent.com/assets/398893/3528330/27ec9fa8-078e-11e4-95cb-709fd11dac16.png) | ![Safari](https://cloud.githubusercontent.com/assets/398893/3528331/29df8618-078e-11e4-8e3e-ed8ac738693f.png) | ![IE](https://cloud.githubusercontent.com/assets/398893/3528325/20373e76-078e-11e4-8e3a-1cb86cf506f0.png) |
+--- | --- | --- | --- | --- |
+39+ ✔ | 42+ ✔ | 29+ ✔ | 10.1+ ✔ | Nope ✘ |
+
+## Dependencies
+
+This library depends on [fetch](https://fetch.spec.whatwg.org/) to make requests to the EduSigner. For environments that don't support fetch, you'll need to provide a [polyfill](https://github.com/github/fetch) to browser or [polyfill](https://github.com/bitinn/node-fetch) to Node.
+
+## Installation
+
+Get ![EduSignerWS](https://certificaedu.com.br/install).
+
+```sh
+$ npm install edu-signer-js --save
+```
+
+## How to use
+
+### ES6
+
+```js
+// to import a specific method
+import EduSigner from 'edu-signer-js';
+
+const signer = new EduSigner({
+  licenseKey: 'YOUR_KEY_HERE'
+});
+
+// using  method
+pki = signer.PKI;
+pki.getVersion().then(data => {
+  console.log('Version: ' + data.version);
+});
+```
+
+### CommonJS
+
+```js
+const EduSigner = require('edu-signer-js').default;
+
+const signer = new EduSigner({
+  licenseKey: 'YOUR_KEY_HERE'
+});
+```
+
+### UMD in Browser
+
+```html
+<!-- to import non-minified version -->
+<script src="edu-signer-js.umd.js"></script>
+
+<!-- to import minified version -->
+<script src="edu-signer-js.umd.min.js"></script>
+```
+
+After that the library will be available to the Global as `EduSigner`. Follow an example:
+
+```js
+
+const signer = new EduSigner({
+  licenseKey: 'YOUR_KEY_HERE'
+});
+
+pki = signer.PKI;
+pki.getVersion().then(data => {
+  console.log('Version: ' + data.version);
+});
+```
+
+## Methods
+
+> Follow the methods that the library provides.
+
+### pki.getVersion()
+
+**Example**
+
+```js
+  pki.getVersion().then(data => {
+    console.log('Version: ' + data.version);
+  }).catch(err => {
+    window.location.href = 'https://certificaedu.com.br/install'; //Will take to the installation page.
+  });
+```
+
+## License
+
+This project is licensed under the MIT License - see the [LICENSE.md](LICENSE.md) file for details