Add flambe_disable_hide_mobile_browser.

This disables the scrollTo() hack that hides the location bar in some
mobile browsers. Since it seems to only work in iOS 6 and Android 2.x,
I'm thinking about removing it altogether, but for now it's behind a
compiler flag.

http://www.html5gamedevs.com/topic/3848-windowscrollto-hack-to-hide-mobile-address-bar-still-relevant/
Add Texture.subTexture.

A super handy API (shamelessly borrowed from PlayN) that makes it really
natural to work with sub-regions of a texture atlas.

    var texture = pack.getTexture("Atlas").subTexture(100, 0, 50, 50);
    trace(texture.width == 50); // true

    // Shows only the 50x50 subtexture
    var image = new ImageSprite(texture);

    // Repeats only the subtexture region
    var pattern = new PatternSprite(texture, 100, 100);
Remove BitmapSprite, use subTexture to draw the region instead.

If you were relying on one of the removed BitmapSymbol properties,
switch to using the properties on the SubTexture. eg: bitmap.x is now
bitmap.texture.x, bitmap.atlas is bitmap.texture.parent, etc.
Pull upstream flambe.
Merge branch 'master' of https://github.com/aduros/flambe into node_canvas