doc/snippets/DenseBase_LinSpaced.cpp

cout << VectorXi::LinSpaced(7,10,4) << endl;
cout << VectorXd::LinSpaced(0.0,1.0,5) << endl;
Added an ei_linspaced_op to create linearly spaced vectors. Added setLinSpaced/LinSpaced functionality to DenseBase. Improved vectorized assignment - overcomes MSVC optimization issues. CwiseNullaryOp is now requiring functors to offer 1D and 2D operators. Adapted existing functors to the new CwiseNullaryOp requirements. Added ei_plset to create packages as [a, a+1, ..., a+size]. Added more nullaray unit tests. 2010-01-26 19:42:17 +01:00			`cout << VectorXi::LinSpaced(7,10,4) << endl;`
			`cout << VectorXd::LinSpaced(0.0,1.0,5) << endl;`