Added PasswordBox component, which has capslock indicator and
echoMode: password by default
Modifed circles, elarun and maldives themes to adapt new PasswordBox
component
Added warning.png legally information
Merge pull request #70 from nslqqq/PasswordBox

Password box
TextBox is focus item.
Use the PasswordBox in the Maui theme too.
Little changes to the caps lock warning text.
Distribute warning image with components and use it by default.