Copy LayoutBox from Enaml.
Add a ConstraintsContainer which doesn't do much yet.
Construct a simple demo for testing constraints layout.
Add the LayoutManager class from Enaml.
Add a little more to the ConstraintsContainer.
Start adding constraints to Component.
Fix a typo.
Add fixed constraints management.
Tie up some loose ends.
Add simple eval()-based parsing for user-specified constraints.
More constraints cleanup. Added a relayout() implementation.
Get the constraints demo sorta working. Resizing does nothing.
Relayout on resize. Still not quite there.
Change the lower right corner to black to help testing.
Add an Enaml file which mirrors the constraints demo (for debug).
Implement symbolic constraints and un-hardcode 'top' and 'right'.
Refine the constraints demo a bit. It works!
Remove the __getattr__ nonsense from LayoutBox.
Add hug and resist control for a Component's size constraints.
Make the constraints demos to match more closely.