Added specs for 8 rendererjs' methods: createUI, createVolume, createRenderer, readVolumeFiles, renderVolume, getVolProps, readJSONFile and readFile
Added specs for 8 rendererjs' methods: createUI, createVolume, createRenderer, readVolumeFiles, renderVolume, getVolProps, readJSONFile and readFile

FNNDSC/rendererjs,FNNDSC/rendererjs,FNNDSC/rendererjs