Feat: Multiplayer sessions added using CRUD database.

node_modules/aos/CONTRIBUTING.md

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+# Contributing to AOS
+
+## Bugs
+
+Found a bug? Have a problem with AOS? Please check past issues, maybe someone already had that problem. If you don't find similar issue create new, but remember to add accurate informations so that I can dig into it straight away. If it's possible add CodePen example that presents called issue.
+
+## Development process
+
+AOS is built using webpack.
+
+### Setup
+
+- Install all dependencies: 
+  
+  ```
+  npm install
+  ```
+
+- Run dev server:
+  
+  ```
+  npm run dev
+  ```
+
+  This will run local webpack-dev-server and build AOS automatically.
+
+- Open browser and head to: 
+  [http://localhost:8080/webpack-dev-server/](http://localhost:8080/webpack-dev-server/)
+  Server loads content from `demo` folder.
+  
+Now you are ready to play with AOS. Browser should reload automatically as you change code in `src` folder.
+
+### Testing
+
+Before you create Pull Request make sure all tests are passing.
+
+In order to do so run:
+```
+npm test
+```
+
+### Commiting changes
+
+If all tests are passing then you're good to go. Commit your changes, but remember to **not commit `dist` folder**.
+Create well described Pull Request with as many informations as possible and wait for my answer :) I'd be happy to make a code review and put some thougths.