Mapping Transpose Feature

[kylekrol]

Added the mapping transpose operation.

Previously, there was only a transpose operation taking in a constant stream. This mean you couldn't assign to the result of a transpose operation even if it makes total sense for that to happen. Now you can do something like this:

lin::Matrix2x2d A;
lin::transpose(A) = { 0.0, 1.0, 2.0, 3.0 };

which has the exact same result as doing:

lin::Matrix2x2d A;
A = { 0.0, 2.0, 1.0, 3.0 };