added potential fix for MaterialIcon support with CocoaPods

Sources/MaterialIcon.swift

@@ -31,7 +31,17 @@
 import UIKit
 
 public struct MaterialIcon {
-    public static let bundle = NSBundle(URL: NSBundle(forClass: MaterialView.self).resourceURL!)
+	private static var internalBundle: NSBundle?
+	public static var bundle: NSBundle {
+		if nil == MaterialIcon.internalBundle {
+			MaterialIcon.internalBundle = NSBundle(forClass: MaterialView.self)
+			let b: NSBundle? = NSBundle(URL: MaterialIcon.internalBundle!.resourceURL!.URLByAppendingPathComponent("io.cosmicmind.Material.bundle"))
+			if let v: NSBundle = b {
+				MaterialIcon.internalBundle = v
+			}
+		}
+		return MaterialIcon.internalBundle!
+	}
     
 	public static let add: UIImage? = UIImage(named: "ic_add_white", inBundle: bundle, compatibleWithTraitCollection: nil)?.imageWithRenderingMode(.AlwaysTemplate)
 	public static let arrowBack: UIImage? = UIImage(named: "ic_arrow_back_white", inBundle: bundle, compatibleWithTraitCollection: nil)?.imageWithRenderingMode(.AlwaysTemplate)