(doc) Add a more visible link to gitter community in README. (#664)

* (doc) Add a more visible link to gitter community in README.
This also adds a few other small improvements to the README file.

Fixes #660.

* minor change

* Update README.md

Co-authored-by: Nicolo John Davis <nicolodavis@gmail.com>

README.md

@@ -10,7 +10,12 @@
 </p>
 
 <p align="center">
-  <strong>Full Documentation: <a href="https://boardgame.io/documentation/#/">link</a></strong>
+  <strong><a href="https://boardgame.io/documentation/#/">Read the Documentation</a></strong>
+
+</p>
+
+<p align="center">
+  <strong>boardgame.io</strong> is an engine for creating turn-based games using JavaScript.
 </p>
 
 Write simple functions that describe how the game state changes
@@ -39,6 +44,12 @@ networking or storage code.
 $ npm install --save boardgame.io
 ```
 
+### Documentation
+
+Read our [Full Documentation](https://boardgame.io/documentation/) to learn how to
+use boardgame.io, and join the [community on gitter](https://gitter.im/boardgame-io/General)
+to ask your questions!
+
 ### Running examples in this repository
 
 ```
@@ -47,6 +58,8 @@ $ npm run build
 $ npm start
 ```
 
+The examples can be found in the [examples](examples/) folder.
+
 ## Changelog
 
 See [changelog](docs/documentation/CHANGELOG.md).
@@ -58,4 +71,4 @@ to find things that you could contribute to.
 
 ## License
 
-MIT
+[MIT](LICENSE)