Added skeleton to be able to write the minimizer.

	  * src/TVL0DecompositionMinimizer.hh: Here.
	  * src/TVL0DecompositionMinimizer.hxx: Here.
	  * src/maxflow/*: Files to compute the maxflow.
Use the minimizer with a Rayleigh distribution.

	* src/Rayleigh2Vars.hh: The Rayleigh distribution.
	* src/Rayleigh2Vars.hxx: The Rayleigh distribution.
	* src/Args.hh: Small fix (a define remained from a copy/paste).
	* src/main.cc: Uses the minimizer.