README: Update README.md and assets

This updates the README text and updates the
demo assets.

README.md

@@ -1,35 +1,20 @@
-# coala-vs-code
+# coala-ls
 
-[![Build Status](https://travis-ci.org/coala/coala-vs-code.svg?branch=master)](https://travis-ci.org/coala/coala-vs-code)
-[![codecov](https://codecov.io/gh/coala/coala-vs-code/branch/master/graph/badge.svg)](https://codecov.io/gh/coala/coala-vs-code)
+[![Build Status](https://travis-ci.org/coala/coala-ls.svg?branch=master)](https://travis-ci.org/coala/coala-ls)
+[![codecov](https://codecov.io/gh/coala/coala-ls/branch/master/graph/badge.svg)](https://codecov.io/gh/coala/coala-ls)
 
-A visual studio code plugin working via [Language Server Protocol (LSP)](https://github.com/Microsoft/language-server-protocol/blob/master/protocol.md).Python versions 3.x is supported.
+A coala language server based on [Language Server Protocol (LSP)](https://github.com/Microsoft/language-server-protocol/blob/master/protocol.md). Python versions 3.x is supported.
 
 ## Feature preview
 
-![](./docs/images/demo.gif)
+![coala-ls demo](./docs/images/demo.gif)
+Watch full video on [YouTube](https://www.youtube.com/watch?v=MeybdlCB96U)
 
 ## Setting up your dev environment, coding, and debugging
 
-You'll need python version 3.5 or greater, run `pip3 install -r requirements.txt` to install the requirements, and run `python3 langserver-python.py --mode=tcp --addr=2087` to start a local languager server listening at port 2087.
-
-Then you should update the `./vscode-client/src/extension.ts` to make client in TCP mode.
-
-```diff
-export function activate(context: ExtensionContext) {
--   context.subscriptions.push(startLangServer
--   (require("path").resolve(__dirname, '../coala-langserver.sh'), ["python"]));
-+   context.subscriptions.push(startLangServerTCP(2087, ["python"]));
-    console.log("coala language server is running.");
-}
-```
-
-To try it in [Visual Studio Code](https://code.visualstudio.com), open ./vscode-client in VS Code and turn to debug view, launch the extension.
-
-## Known bugs
-
-* [Language server restarts when `didSave` requests come](https://github.com/coala/coala-vs-code/issues/7)
+You'll need python version 3.5 or greater, run `pip3 install -r requirements.txt` to install the requirements, and run `python3 -m coalals --mode=tcp --addr=2087` to start a local language server listening at port 2087. Currently stdio mode is also supported and can be used by invoking coalals with `--mode=stdio`.
 
 ## Reference
 
 * [python-langserver](https://github.com/sourcegraph/python-langserver)
+* [python-language-server](http://github.com/palantir/python-language-server)