G-Node/nix — pull request #254 by gicmo (2014-06-22 14:56:03+00:00)
Title: SimpleTag::units convert argument from ref to const ref

Do this so we can bind to rvalues and thus enable calls to units
with initialiser list, i.e. SimpleTag::units({"mV", "cm", "m^2"});

This should fix issue #252