simplified resizing code
switch to layeredPane approach
added comparison feature
implement continual size verification; add modularity; fixes #15
added backend support for dimming panels
documentation
improved modularity
simplified Screen implementation
abstracted transition support features
updated documentation and exception handling
standardized layer values
updated transition code
updated exception handling
updated documentation
added support class for modularization
added support class for modularization
updated transition implementation
Merge pull request #16 from zcmoore/screen_system

Merge Screen improvments