preamble.tex

\usepackage[utf8]{inputenc}
\usepackage[USenglish]{babel}
\usepackage{enumitem}
\usepackage{tikz}
\usepackage{verbatim}
%\def\checkmark{\tikz\fill[scale=0.4](0,.35) -- (.25,0) -- (1,.7) -- (.25,.15) -- cycle;} % Removed by Matthew to use pifont's \checkmark instead

%\usepackage{natbib}
\usepackage{graphicx}
\usepackage[a4paper,margin=2cm]{geometry}% A4 for a US project?
\usepackage{lineno}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage{hyperref}
\hypersetup{
 colorlinks=true, % false: boxed links; true: colored links
 linkcolor=black, % color of internal links
 citecolor=blue, % color of links to bibliography
 filecolor=magenta, % color of file links
 urlcolor=blue % color of external links
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\usepackage{amssymb}% http://ctan.org/pkg/amssymb
\usepackage{amsmath}
\usepackage{pifont}% http://ctan.org/pkg/pifont
\providecommand{\xmark}{\ding{55}}% https://tex.stackexchange.com/questions/42619/x-mark-to-match-checkmark

%N.B.: If you are going to be defining your own commands please use \providecommand instead of \newcommand. c.f.: https://tex.stackexchange.com/questions/36175/what-do-newcommand-renewcommand-and-providecommand-do-and-how-do-they-differ - Matthew

% https://tex.stackexchange.com/questions/25701/bibtex-vs-biber-and-biblatex-vs-natbib
\usepackage[backend=biber,defernumbers=true,sorting=none,giveninits=true,natbib=true,style=numeric-comp]{biblatex}

% avoid printing "In: " with no journal to follow, for arxiv-only papers
\renewbibmacro{in:}{}
\addbibresource{bib/references.bib}