fix(): improve readme tutorial

@ks89/ngx-codemirror/.gitignore

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+node_modules/*
+*.iml
+.idea
+aot/*
+lib/*
+npm-debug.log
+.DS_Store

@ks89/ngx-codemirror/.npmignore

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+aot/*

@ks89/ngx-codemirror/LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2018 Stefano Cappa (Ks89)
+Copyright (c) 2016 Simon Babay
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

@ks89/ngx-codemirror/README.md

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+# @ks89/ngx-codemirror
+
+**Fork of the official [ng2-codemirror](https://github.com/chymz/ng2-codemirror) library with angular-universal / Server side rendering support.**
+
+<br><br>
+
+**Tested only with Angular 6.x.x and angular-cli 6.x.x**
+
+
+## Installation
+
+`npm i --save @ks89/ngx-codemirror@latest codemirror`
+
+## Configuration
+
+1. Install `npm i --save-dev @types/node`
+2. Modify your tsconfig.app.json adding this:
+
+    ```
+    "compilerOptions": {
+        "types": [
+              "node"
+        ]
+    }
+    ```
+
+3. Add this in your main tsconfig.json (if already not available):
+
+    ```
+    "compilerOptions": {
+        "typeRoots": [
+            "node_modules/@types"
+        ]
+    }
+    ```
+
+4. Import language in main.ts
+
+    ```
+    import 'codemirror/mode/htmlmixed/htmlmixed';
+    import 'codemirror/mode/javascript/javascript';
+    ```
+
+5. Add `"node_modules/codemirror/lib/codemirror.js"` in all scripts arrays of yout angular.json file
+    
+    ```
+    ...
+    "architect": {
+        "build": {
+            "builder": "@angular-devkit/build-angular:browser",
+            "options": {
+                ...
+                "scripts": [
+                  "node_modules/codemirror/lib/codemirror.js"
+                ],
+                ...
+            }
+        }
+    },
+    ...
+    "test": {
+        ...
+        "scripts": [
+          "node_modules/codemirror/lib/codemirror.js"
+        ],
+        ...
+    }
+    
+    ```
+
+<br><br>
+
+## Contributions
+
+To build this project run `tsc` in the root folder.
+
+<br><br>
+
+Use the [CodeMirror (5.x)](http://codemirror.net/) code editor in your Angular application.
+
+**Demo** : https://embed.plnkr.co/8e9gxss9u10VeFrv29Zt/
+
+### <a name="install"></a>Installation
+
+- Include Codemirror javascript files in your application (with files for modes)
+- Install ng2-codemirror
+  - JSPM : `jspm install npm:ng2-codemirror`
+  - NPM : `npm install ng2-codemirror`
+
+### <a name="dependencies"></a>Dependencies
+CodeMirror library is required for this component :
+  - Install via NPM : `npm install codemirror`
+  - Install via JSPM : `jspm install npm:codemirror`
+
+CodeMirror need to be accessible by `import 'codemirror'`
+
+Then you need to include base CSS of codemirror located in `codemirror/lib/codemirror.css`
+
+### <a name="sample"></a>Sample
+
+Include `CodemirrorModule` in your main module :
+
+```javascript
+import { CodemirrorModule } from 'ng2-codemirror';
+
+@NgModule({
+  // ...
+  imports:      [
+    CodemirrorModule
+  ],
+  // ...
+})
+export class AppModule { }
+```
+
+```javascript
+import { Component } from 'angular2/core';
+
+@Component({
+  selector: 'sample',
+  template: `
+    <codemirror [(ngModel)]="code"
+      [config]="{...}"
+      (focus)="onFocus()"
+      (blur)="onBlur()">
+    </codemirror>
+  `
+})
+export class Sample{
+  constructor(){
+    this.code = `// Some code...`;
+  }
+}
+```
+
+### <a name="config"></a>Configuration
+
+* `config` : The configuration object for CodeMirror see http://codemirror.net/doc/manual.html#config
+
+### <a name="licence"></a>Licence
+See `LICENSE` file