Add some typography packages

misc/preamble.tex

@@ -7,6 +7,8 @@
 \usepackage{lmodern} % original CM font doesn't work well with [T1]{fontenc}
 % use different sans font
 \usepackage[semibold]{sourcesanspro}
+\usepackage{microtype}
+\usepackage[all, defaultlines=2]{nowidow}
 
 % set language
 \ifenglish%