* javax/swing/BoxLayout.java
	(serialVersionUIR): New member variable.
	(X_AXIS, Y_AXIS): Documentation added.
	(LINE_AXIS, PAGE_AXIS): New constants.
	(grid): Renamed from gridbag.
	(BoxLayout): Use new constants, throw exception if invalid value for
	way, added documentation.
	(BoxLayout): Removed.
	(addLayoutComponent): Use new constants, added documentation.
	(removeLayoutComponent): Likewise.
	(addLayoutContainer): Added documentation.
	(preferredLayoutSize): Added documentation, check given argument.
	(minimumLayoutSize): Likewise.
	(layoutContainer): Likewise.
	(getLayoutAlignmentX): Likewise.
	(getLayoutAlignmentY): Likewise.
	(invalidateLayout): Likewise.
	(maximumLayoutSize): Likewise.

From-SVN: r73878