Defines new getters in the minimizer.

		* src/TVL0DecompositionMinimizer.hh: Here.
		* src/TVL0DecompositionMinimizer.hxx: Here.
Implements the approache "One BV, several S".

		   * src/ComputeByParts.hh: Here.
		   * src/ComputeByParts.hxx: Here.
		   * src/main.cc: Use it.
Added an argument to switch between OneBVSeveralS method and the normal one.

Only works on sub-optimal for now.

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