chore(docs): add flex-layout directions

Author: jeremymwells

docs/documentation/stories/include-angular-flex.md

@@ -0,0 +1,77 @@
+# Include [Flex Layout](https://github.com/angular/flex-layout) in your CLI application
+
+Include Angular Flex layout as detailed above.
+
+Install the `@angular/flex-layout` library and add the dependency to package.json...
+```bash
+npm install --save @angular/flex-layout
+```
+
+Import the Angular Flex-Layout NgModule into your app module...
+```javascript
+//in src/app/app.module.ts 
+
+import { FlexLayoutModule } from '@angular/flex-layout';
+// other imports 
+
+@NgModule({
+  imports: [
+    ...
+    FlexLayoutModule.forRoot()
+  ],
+  ...
+})
+```
+
+Run `ng serve` to run your application in develop mode, and navigate to `http://localhost:4200`
+
+Add the following to `src/app/app.component.css`...
+```css
+.header {
+  background-color: lightyellow;
+}
+
+.left {
+  background-color: lightblue;
+}
+
+.right {
+  background-color: pink;
+}
+```
+
+To verify flex-layout has been set up correctly, change `src/app/app.component.html` to the following...
+```html
+<div fxLayout="column">
+
+  <div class="header" fxLayout="row" fxLayoutAlign="space-between center">
+    
+    <h1>
+      {{title}}
+    </h1>
+
+  </div>
+
+  <div fxLayout="row">
+
+    <div class="left" fxFlex="20">
+      LEFT: 20% wide
+    </div>
+
+    <div class="right" fxFlex>
+      RIGHT: 80% wide
+    </div>
+
+  </div>
+</div>
+```
+
+After saving this file, return to the browser to see the very ugly but demonstrative flex-layout.
+
+Among what you should see are - a light yellow header that is the entire width of the window, sitting directly atop 2 columns. Of those 2 columns, the left column should be light blue, and 20% wide, while the right column is pink, 80% to start, and will flex with window (re)size.
+
+### More Info 
+
+ - [Installation](https://github.com/angular/flex-layout#installation)
+ - [API Overview](https://github.com/angular/flex-layout/wiki/API-Overview)
+ - [Demo](https://tburleson-layouts-demos.firebaseapp.com/#/docs)