Removed OxidePalette.java whereas it is unnecessary due to the
implementation of skinning.

OxideComponentFactory: the constructor now takes an OxideSkin instance
as input by which the factory member methods will generate UI components
adhering to the aesthetic and palette defined by that OxideSkin.

OxideDefaultSkin, OxideSkin: fixed a member method title typo.

OxideFrame: replaced calls to OxidePalette with calls to the given
OxideSkin.