gui namespace refactor
	renamed:    stigame/GuiButton.cpp -> stigame/Button.cpp
	renamed:    stigame/GuiButton.h -> stigame/Button.h
	renamed:    stigame/GuiCheckBox.cpp -> stigame/CheckBox.cpp
	renamed:    stigame/GuiCheckBox.h -> stigame/CheckBox.h
	renamed:    stigame/GuiComboBox.cpp -> stigame/ComboBox.cpp
	renamed:    stigame/GuiComboBox.h -> stigame/ComboBox.h
	modified:   stigame/GuiHighlightItem.cpp
	modified:   stigame/GuiHighlightItem.h
	modified:   stigame/GuiItem.cpp
	modified:   stigame/GuiItem.h
	renamed:    stigame/GuiImage.cpp -> stigame/Image.cpp
	renamed:    stigame/GuiImage.h -> stigame/Image.h
	renamed:    stigame/GuiImageButton.cpp -> stigame/ImageButton.cpp
	renamed:    stigame/GuiImageButton.h -> stigame/ImageButton.h
	renamed:    stigame/GuiKeyBind.cpp -> stigame/KeyBind.cpp
	renamed:    stigame/GuiKeyBind.h -> stigame/KeyBind.h
	renamed:    stigame/GuiLabel.cpp -> stigame/Label.cpp
	renamed:    stigame/GuiLabel.h -> stigame/Label.h
	renamed:    stigame/GuiRadioButton.cpp -> stigame/RadioButton.cpp
	renamed:    stigame/GuiRadioButton.h -> stigame/RadioButton.h
	modified:   stigame/StiGame.cbp
	renamed:    stigame/GuiStyle.cpp -> stigame/Style.cpp
	renamed:    stigame/GuiStyle.h -> stigame/Style.h