updating ImageCardView to allow dynamic image sizing

Source/ImageCardView.swift

@@ -35,12 +35,14 @@ public class ImageCardView : MaterialPulseView {
 			if let v = value {
 				imageLayer.contents = v.CGImage
 				if 0 == imageLayer.frame.size.height {
-					imageLayer.frame.size.height = 200
+					imageLayer.frame.size.height = v.size.height
 				}
+				imageLayer.hidden = false
 			}
 			else {
+				imageLayer.contents = nil
 				imageLayer.frame = CGRectZero
-				imageLayer.removeFromSuperlayer()
+				imageLayer.hidden = true
 			}
 			reloadView()
 		}

Source/MaterialTheme.swift

@@ -143,11 +143,11 @@ public extension MaterialTheme.imageCardView {
 	// shape
 	public static var masksToBounds: Bool = true
 	public static var cornerRadius: MaterialRadius = .None
-	public static var contentInsetsRef: MaterialInsetsType = MaterialInsetsToValue(.Square3)
-	public static var titleLabelInsetsRef: MaterialInsetsType = (top: 0, left: 8, bottom: 0, right: 8)
-	public static var detailLabelInsetsRef: MaterialInsetsType = (top: 0, left: 8, bottom: 16, right: 8)
-	public static var leftButtonsInsetsRef: MaterialInsetsType = (top: 8, left: 8, bottom: -8, right: 0)
-	public static var rightButtonsInsetsRef: MaterialInsetsType = (top: 8, left: 0, bottom: -8, right: 8)
+	public static var contentInsetsRef: MaterialInsetsType = MaterialInsetsToValue(.Square2)
+	public static var titleLabelInsetsRef: MaterialInsetsType = (top: 8, left: 16, bottom: 0, right: 16)
+	public static var detailLabelInsetsRef: MaterialInsetsType = (top: 8, left: 16, bottom: 16, right: 16)
+	public static var leftButtonsInsetsRef: MaterialInsetsType = (top: 8, left: 0, bottom: 0, right: 0)
+	public static var rightButtonsInsetsRef: MaterialInsetsType = (top: 8, left: 0, bottom: 0, right: 0)
 	
 	// border
 	public static var borderWidth: MaterialBorder = .None