Add support for window in window.

This allow developers to put window inside another window, this function
has no limit of window children's inside another window children's,
single limitations is the power processing because the biggest is number
of window children's inside window children's the slower will be the
refresh the screen.
Change the example project
Change the example project
Fix error when structure address is 0 or -1.
Fix initialization of eMMC.
Add exclusion of fs probe.
Add possibility of interrupt inside interrupt.
Fix dependency.