issue-27: updated some logic

Source/FlatButton.swift

@@ -24,7 +24,7 @@ public class FlatButton : MaterialButton {
 	//
 	internal override func prepareView() {
 		super.prepareView()
-		setTitleColor(MaterialTheme.blueGrey.darken1, forState: .Normal)
+		setTitleColor(MaterialTheme.blue.accent2, forState: .Normal)
 		backgroundColor = MaterialTheme.clear.color
 		contentEdgeInsets = UIEdgeInsetsMake(4, 16, 4, 16)
 	}

Source/MaterialButton.swift

@@ -44,7 +44,7 @@ public class MaterialButton : UIButton {
 	/**
 		:name:	pulseColor
 	*/
-	public var pulseColor: UIColor? = MaterialTheme.blueGrey.lighten3
+	public var pulseColor: UIColor? = MaterialTheme.blue.lighten3
 	
 	/**
 		:name:	init

Source/MaterialCardView.swift

@@ -49,7 +49,7 @@ public class MaterialCardView : UIView {
 	/**
 		:name:	pulseColor
 	*/
-	public var pulseColor: UIColor = MaterialTheme.blueGrey.lighten3
+	public var pulseColor: UIColor = MaterialTheme.blue.lighten3
 	
 	/**
 		:name:	init

Source/RaisedButton.swift

@@ -25,7 +25,7 @@ public class RaisedButton : MaterialButton {
 	internal override func prepareView()  {
 		super.prepareView()
 		setTitleColor(MaterialTheme.white.color, forState: .Normal)
-		backgroundColor = MaterialTheme.blueGrey.darken1
+		backgroundColor = MaterialTheme.blue.accent2
 		contentEdgeInsets = UIEdgeInsetsMake(4, 16, 4, 16)
 	}