update init for Card Views

Source/BasicCardView.swift

@@ -190,7 +190,14 @@ public class BasicCardView : MaterialCardView, Comparable, Equatable {
 	/**
 		:name:	init
 	*/
-	public convenience init?(titleLabel: UILabel? = nil, detailLabel: UILabel? = nil, divider: UIView? = nil, leftButtons: Array<MaterialButton>? = nil, rightButtons: Array<MaterialButton>? = nil) {
+	public convenience init() {
+		self.init(frame: CGRectZero)
+	}
+	
+	/**
+		:name:	init
+	*/
+	public convenience init(titleLabel: UILabel? = nil, detailLabel: UILabel? = nil, divider: UIView? = nil, leftButtons: Array<MaterialButton>? = nil, rightButtons: Array<MaterialButton>? = nil) {
 		self.init(frame: CGRectZero)
 		prepareProperties(titleLabel, detailLabel: detailLabel, divider: divider, leftButtons: leftButtons, rightButtons: rightButtons)
 	}

Source/ImageCardView.swift

@@ -240,7 +240,14 @@ public class ImageCardView : MaterialCardView, Comparable, Equatable {
 	/**
 		:name:	init
 	*/
-	public convenience init?(imageView: UIImageView? = nil, titleLabel: UILabel? = nil, detailLabel: UILabel? = nil, divider: UIView? = nil, leftButtons: Array<MaterialButton>? = nil, rightButtons: Array<MaterialButton>? = nil) {
+	public convenience init() {
+		self.init(frame: CGRectZero)
+	}
+	
+	/**
+		:name:	init
+	*/
+	public convenience init(imageView: UIImageView? = nil, titleLabel: UILabel? = nil, detailLabel: UILabel? = nil, divider: UIView? = nil, leftButtons: Array<MaterialButton>? = nil, rightButtons: Array<MaterialButton>? = nil) {
 		self.init(frame: CGRectZero)
 		prepareProperties(imageView, titleLabel: titleLabel, detailLabel: detailLabel, divider: divider, leftButtons: leftButtons, rightButtons: rightButtons)
 	}