TODO:
	(done 1.0) Fix the "get determinant" method.
	(done 1.0) Import/Export of matrices.
	(done 1.0) Add a statusbar with various informations.
	(done 1.0) Making the dialogs bigger (fits how manu cols'n'rows)
	(done 1.0) Improve the matrix-to-text method (when using large/(very)small
numbers).
	(done 1.0) Show in the frame for M1, M2, Pre, Res which ID is show
in them.
	(done 1.0) Commandline options.
	(done 1.0) GTK GUI. (when option -gui is used)
	(done 1.0) A small site for the program.