Normal (i.e. unsigned char images) can now be computed using the ComputeByParts
strategy.

		* src/ComputeByParts.hxx: now handles CV_8U images.
Cleaning the output.

		 * src/ComputeByParts.hxx: Do not write a new line at each iteration.
		 * src/TVL0DecompositionMinimizer.hxx: Do not write messages anymore.
Added arguments to run the non optimal mode.

	  * src/Args.cc: Here.
	  * src/Args.hh: Here.
	  * src/main.cc: Use them.