more robust install/uninstall;
clarified extension_name (again): --locate-extension wants to see a lowercase name;
%%
%% default hyperref setup (both for pdf and dvi output)
%%
\usepackage{color}
\definecolor{linkcolor}{rgb}{0,0,0.5}
\usepackage[colorlinks=true,linkcolor=linkcolor,citecolor=linkcolor,filecolor=linkcolor,urlcolor=linkcolor,pdfpagelabels]{hyperref}