Added bottom sheet example app (#64)

bottom_sheet/lib/home.dart

@@ -0,0 +1,63 @@
+import 'package:flutter/material.dart';
+import 'package:project/models/ListTileModel.dart';
+
+class MyHomePage extends StatefulWidget {
+  MyHomePage({Key key, this.title}) : super(key: key);
+
+  final String title;
+
+  @override
+  _MyHomePageState createState() => _MyHomePageState();
+}
+
+class _MyHomePageState extends State<MyHomePage> {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(widget.title),
+        backgroundColor: Colors.redAccent,
+      ),
+      body: Center(
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: <Widget>[
+            new RaisedButton(
+              child: Text(
+                "Bottom Sheet",
+                style: TextStyle(fontSize: 20),
+              ),
+              onPressed: () {
+                _openBottomSheet(context);
+              },
+            )
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+void _openBottomSheet(context) {
+
+  showModalBottomSheet(
+    context: context,
+    builder: (builder) {
+      return new Container(
+        padding: EdgeInsets.all(5.0),
+        child: new Wrap(
+          children: <Widget>[
+            getListTile(Icons.more, Colors.black45, "More", context),
+            getListTile(Icons.favorite, Colors.pink, "Favourites", context),
+            getListTile(Icons.account_box, Colors.blue, "Profile", context),
+            new Divider(
+              thickness: 2.0,
+              height: 10.0,
+            ),
+            getListTile(Icons.exit_to_app, null, "Logout", context),
+          ],
+        ),
+      );
+    },
+  );
+}