ENH: Add documentation in the article for SetComponentMask.

Author: thewtex

article/split_components.pdf

@@ -135,7 +135,8 @@ \section{Class Overview}
 The class is templated over the input image type, the output image type, and the
 number of components in the input image pixels.
 
-Implementation is multi-threaded.
+Implementation is multi-threaded.  A subset of the outputs can be allocated and
+populated with the \code{SetComponentMask} method.
 
 \section{An Example}