[Added] Plugins can pass images and plugins can get images as input through
OutputData(...) and InputData(...) functions
for this PluginPassData has new functions setImage(...) and getImage().

	modified:   NoobaFE/Resources/stylesheet.css
	modified:   NoobaPluginAPI/NoobaPluginAPI.pro
	modified:   NoobaPluginAPI/noobapluginapi.cpp
	modified:   NoobaPluginAPI/noobapluginapi.h
	modified:   NoobaPluginAPI/noobapluginbase.h
	modified:   README