Changed/enhanced the following:
-updated jshint,and grunt-contrib-concat
- resizing does not depend on margin of the  .window.Resizing currsor is triggered 5 px from the edges of the .window div.
- support resize diagonaly and also working on FF and IE.
- fixed windowy sticking to the mouse while fast window dragging and releasing mouse while moving fast (the mouseup event not caught outside the header (handle) )
- resizing adds scrollbars to the body content if the content has min-width, instead of the whole window