CornerstoneImageRendered event detail now includes the time to render the image
CornerstoneNewImage event detail now includes the frame rate (based on the previous image displayed)
modified drawImage() for color images such that LUT is only applied if the ww/wc differs from the default.  This will improve performance under the assumption that ww/wc does not need to be applied to display the color image properly (i.e. it was saved as it should be displayed by default)
removed console.log messages that snuck in on last commit