##Summary This control provide the ability to use a passwordbox with a placeholder text over it.
##Compatibility This control has been made for Windows Phone 8.0 (Silverlight runtime). The PlaceholderText is part of the new PasswordBox control in Windows Phone 8.1 (WinRT).
##Characteristics
- This is a pure Control, it inherits directly from control and not UserControl.
- It is fully templateable
- It has been made on purpose to use a textblock as a placeholder. It ease the most common use of the placeholder cases. Feel free to fork and modify it if you want to make a kind of ContentControl out of it.