RemoteViewsTarget feature requested on #242

Ability to load a bitmap into an ImageView of a Widget using
RemoteViews.

Example of usage on the following gist
https://gist.github.com/pavlospt/00242d5102ac8f76e169
Yes but SimpleTarget also requires the user to set a width height and by default sets a width and height of -1 if the constructor is empty and accordingly throws an exception. I thought of avoiding such a behavior and that's why I created this constructor.