Add example code

Example/ISEmojiViewSample/ViewController.m

@@ -7,6 +7,7 @@
 //
 
 #import "ViewController.h"
+#import "ISEmojiView.h"
 
 @interface ViewController ()
 
@@ -16,12 +17,20 @@
 
 - (void)viewDidLoad {
     [super viewDidLoad];
-    // Do any additional setup after loading the view, typically from a nib.
+    
+    // init TextView
+    UITextView *textView = [[UITextView alloc] initWithFrame:self.view.frame];
+    [self.view addSubview:textView];
+    
+    // init ISEmojiView
+    ISEmojiView *emojiView = [[ISEmojiView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 216)];
+    textView.inputView = emojiView;
+    
+    [textView becomeFirstResponder];
 }
 
 - (void)didReceiveMemoryWarning {
     [super didReceiveMemoryWarning];
-    // Dispose of any resources that can be recreated.
 }
 
 @end