Adding noexcept to finally, final_act, narrow_cast. Fixes #92.
Adding noexcept to finally, final_act, narrow_cast. Fixes #92.

jbcoe/GSL,Josaphat/GSL,eteran/GSL,kernhanda/GSL,neilmacintosh/GSL,kevgs/GSL,garyfurnish/GSL,nguarracino/GSL,trebconnell/GSL,matus-chochlik/GSL,martinmoene/GSL,bashrc-real/GSL,vladon/GSL