Resolve conflicts (Panel commit part 1)
Our own rectangle.  Maybe not worth it; we'll see. (Panel commit part 2)
A multilocation resource locator.  And a font cache that uses it. (Panel commit part 3)
Fail code NOT_FOUND. (Panel commit part 4)
Point convenience routines Clear(), IsZero, max, min. (Panel commit part 5)
Somewhat general drawable panel (Panel commit part 6)
Make AbstractButton a Panel (Panel commit part 7)
Reinvent Drawing as a GraphicsContext-like thing (Panel commit part 8)
GridPanel not yet ready for prime time.  Clean up misplaces AtomicLong (Panel commit part 9)
Convert GridRenderer to Drawing-based.  Inline TileRenderer (Panel commit part 10)
Convert StatsRenderer to Drawing-based.  (.h already in?) (Panel commit part 11)
Convert TileRenderer to Drawing-based. (Panel commit part 12)
Convert GridRenderer to Drawing-based -- missed piece part 13)
In-progress not-yet-used StdPanel (Panel commit part 14 of 14)
Merge pull request #20 from DaveAckley/master

First cut cheapo 'window system' implementation..