[std, layout] Use ISO 216:2007-defined paper size (A4).

Fixes NB ISO-22 (C++17 DIS).

This change maintains the width of the text block at 16.51cm/6.5" as it was previously by using horizontal margins of 2.245cm on both sides. The vertical margins become slightly smaller.

Author: tkoeppe

source/layout.tex

@@ -4,10 +4,8 @@
 %%--------------------------------------------------
 %%  set page size, type block size, type block position
 
-\setstocksize{11in}{8.5in}
-\settrimmedsize{11in}{8.5in}{*}
-\setlrmarginsandblock{1in}{1in}{*}
-\setulmarginsandblock{1in}{*}{1.618}
+\setlrmarginsandblock{2.245cm}{2.245cm}{*}
+\setulmarginsandblock{2.5cm}{2.5cm}{*}
 
 %%--------------------------------------------------
 %%  set header and footer positions and sizes

source/std.tex

@@ -3,9 +3,7 @@
 
 %%--------------------------------------------------
 %% basics
-% \documentclass[letterpaper,oneside,openany]{memoir}
-\documentclass[ebook,10pt,oneside,openany,final]{memoir}
-% \includeonly{declarations}
+\documentclass[a4paper,10pt,oneside,openany,final]{memoir}
 
 \usepackage[american]
            {babel}        % needed for iso dates