Much Work

- Definable KeyMaps
- Change 'Tabbable' to just use 'Focusable'

widget.go

@@ -32,14 +32,16 @@ type Widget interface {
 	HandleResize(*tcell.EventResize)
 	HandleKey(*tcell.EventKey) bool
 	HandleTime(*tcell.EventTime)
+	SetKeyMap(km KeyMap)
+	AddToKeyMap(km KeyMap)
+	RemoveFromKeyMap(km KeyMap)
 	Draw(tcell.Screen)
 	Active() bool
 	SetActive(bool)
 	Visible() bool
 	SetVisible(bool)
 	Focusable() bool
-	Tabbable() bool
-	SetTabbable(bool)
+	SetFocusable(bool)
 	SetX(int)
 	SetY(int)
 	GetX() int