Added production version, updated readme

README.md

@@ -1,5 +1,4 @@
-FileSaver.js
-============
+# FileSaver.js
 
 FileSaver.js implements the HTML5 W3C `saveAs()` FileSaver interface in browsers that do
 not natively support it. There is a [FileSaver.js demo][1] that demonstrates saving
@@ -12,8 +11,7 @@ sent to an external server.
 Looking for `canvas.toBlob()` for saving canvases? Check out
 [canvas-toBlob.js](https://github.com/eligrey/canvas-toBlob.js) for a cross-browser implementation.
 
-Supported Browsers
-------------------
+## Supported Browsers
 
 | Browser        | Constructs as | Filenames    | Max Blob Size | Dependencies |
 | -------------- | ------------- | ------------ | ------------- | ------------ |
@@ -45,15 +43,13 @@ See [ChenWenBrian's `saveTextAs()`](https://github.com/ChenWenBrian/FileSaver.js
 Blobs may be opened instead of saved sometimes—you may have to direct your Safari users to manually
 press <kbd>⌘</kbd>+<kbd>S</kbd> to save the file after it is opened. Using the `application/octet-stream` MIME type to force downloads [can cause issues in Safari](https://github.com/eligrey/FileSaver.js/issues/12#issuecomment-47247096).
 
-Syntax
-------
+## Syntax
 
 ```js
 FileSaver saveAs(in Blob data, in DOMString filename)
 ```
 
-Examples
---------
+## Examples
 
 ### Saving text
 
@@ -85,3 +81,13 @@ Note: The standard HTML5 `canvas.toBlob()` method is not available in all browse
   [3]: https://developer.mozilla.org/en-US/docs/DOM/Blob
   [4]: https://github.com/eligrey/Blob.js
   [5]: https://github.com/eligrey/canvas-toBlob.js
+
+## Contributing
+
+The `FileSaver.js` distribution file is compiled with Uglify.js like so:
+
+```bash
+uglifyjs FileSaver.js --comments /@source/ > FileSaver.min.js
+```
+
+Please make sure you build a production version before submitting a pull request.