Added animated flask demo.

This is a mid-level Core Animation demo.

AnimatedFlask/AnimatedFlask/AnimatedFlask-Info.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleDisplayName</key>
+	<string>${PRODUCT_NAME}</string>
+	<key>CFBundleExecutable</key>
+	<string>${EXECUTABLE_NAME}</string>
+	<key>CFBundleIdentifier</key>
+	<string>com.RobertBrown.${PRODUCT_NAME:rfc1034identifier}</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>${PRODUCT_NAME}</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>1.0</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UIMainStoryboardFile</key>
+	<string>MainStoryboard</string>
+	<key>UIRequiredDeviceCapabilities</key>
+	<array>
+		<string>armv7</string>
+	</array>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+	</array>
+</dict>
+</plist>

AnimatedFlask/AnimatedFlask/AnimatedFlask-Prefix.pch

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+//
+// Prefix header for all source files of the 'AnimatedFlask' target in the 'AnimatedFlask' project
+//
+
+#import <Availability.h>
+
+#ifndef __IPHONE_5_0
+#warning "This project uses features only available in iOS SDK 5.0 and later."
+#endif
+
+#ifdef __OBJC__
+    #import <UIKit/UIKit.h>
+    #import <Foundation/Foundation.h>
+#endif

AnimatedFlask/AnimatedFlask/RBAnimatedFlask.h

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+//
+//  RBAnimatedFlask.h
+//  AnimatedFlask
+//
+//  Created by Robert Brown on 7/24/12.
+//  Copyright (c) 2012 Robert Brown. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface RBAnimatedFlask : UIView
+
+@property (nonatomic, assign, getter=isAnimating, readonly) BOOL animating;
+
+- (void)startAnimating;
+
+- (void)stopAnimating;
+
+- (void)toggleAnimating;
+
+@end