Checking in latest experimental version
moved files to subdir
Removing dependency for std::string temporarily.
Added renderer and basic support with compositor.
More foundational work
Working out events...
Cleanup Point type.
Working on style stuff...
Resolve an issue with losing hot when a panel was focused.
Adding basic image handling; make sure renderer calls begin/end frame.
Adding in zordering code
Integrated container into Panel base class.
Event tweaks; added local panel coordinates.
Locals must also be calculated during a drag.
Adding font rendering
More event handling, cursor buttons
Adding update mechanism; Render now operates on child panels.
Added calculation of bounds during update; child panels can now be relatively positioned inside of parent containers.
Added the ability to find the deepest subpanel.
Event stuff; fix focus on cursor moves.