new option for paper size

Hi check this new options for Dissertate.cls
It allows to choose between A4 and US Letter with:
dpaperafour OR dpaperletter
\NeedsTeXFormat{LaTeX2e} \ProvidesClass{Dissertate}[2014/03/25 v2.0 Dissertate Class]
%
% Options
%
\RequirePackage{etoolbox}

%************************************%
\usepackage{ifthen}

% Paper size
%   Allows to use A4 or Letter paper sizes.

\newboolean{paperafour}
\newboolean{paperletter}

\DeclareOption{dpaperafour}{
    \setboolean{paperafour}{true}
}
\DeclareOption{dpaperletter}{
    \setboolean{paperletter}{true}
}
%************************************%

% Line spacing: dsingle/ddouble
%   Whether to use single- or doublespacing.
\newtoggle{DissertateSingleSpace}
\togglefalse{DissertateSingleSpace}
\DeclareOption{dsingle}{
    \toggletrue{DissertateSingleSpace}
    \ClassWarning{Dissertate}{Single-spaced mode on.}
}
\DeclareOption{ddouble}{\togglefalse{DissertateSingleSpace}}

%************************************%
% Process the options before reading them
\ProcessOptions\relax

% Paper size
\ifthenelse{\boolean{paperafour}}{
    \LoadClass[12pt, oneside,a4paper]{book}
    \ClassWarning{Dissertate}{Paper size set to A4.}
}{}

\ifthenelse{\boolean{paperletter}}{
    \LoadClass[12pt, oneside,letterpaper]{book}
    \ClassWarning{Dissertate}{Paper size set to US Letter.}
}{}
%************************************%

% Line Spacing
%   Define two line spacings: one for the body, and one that is more compressed.
\iftoggle{DissertateSingleSpace}{
    \newcommand{\dnormalspacing}{1.2}
    \newcommand{\dcompressedspacing}{1.0}
}{
    \newcommand{\dnormalspacing}{2.0}
    \newcommand{\dcompressedspacing}{1.2}
}

% Block quote with compressed spacing
\let\oldquote\quote
\let\endoldquote\endquote
\renewenvironment{quote}
    {\begin{spacing}{\dcompressedspacing}\oldquote}
    {\endoldquote\end{spacing}}

% Itemize with compressed spacing
\let\olditemize\itemize
\let\endolditemize\enditemize
\renewenvironment{itemize}
    {\begin{spacing}{\dcompressedspacing}\olditemize}
    {\endolditemize\end{spacing}}

% Enumerate with compressed spacing
\let\oldenumerate\enumerate
\let\endoldenumerate\endenumerate
\renewenvironment{enumerate}
    {\begin{spacing}{\dcompressedspacing}\oldenumerate}
    {\endoldenumerate\end{spacing}}

%************************************%
% Text layout.
\ifthenelse{\boolean{paperafour}}{
    \RequirePackage[width=5.75in, a4paper]{geometry}
}{}

\ifthenelse{\boolean{paperletter}}{
    \RequirePackage[width=5.75in,letterpaper]{geometry}    
}{}
%************************************%
\usepackage{ragged2e}
\RaggedRight
\RequirePackage{graphicx}
\usepackage{fixltx2e}
\parindent 12pt
\RequirePackage{lettrine}
\RequirePackage{setspace}
\RequirePackage{verbatim}
suchow / Dissertate

new option for paper size #74
