Added further description regarding the use of the `assignment` key.

% \textsf{pdfpages} package |\includepdfmerge| command

% documentation) to the pdf files containing the thesis assignment

% to \textit{list}. The \textit{list} is stored within the

% |\thesis@assignmentFiles| private macro. When defined, the PDF

% files are injected into the resulting document instead of the

% placeholder |\thesis@@{assignment}| string.

% |\thesis@assignmentFiles| private macro.

%

% Be aware that the files will be injected into the document

% \emph{exactly} as specified. Specifically in case of a

% double-sided document, you should consider manually adding

% blank pages in between separate parts of the assignment to ensure

% that they will be typeset starting on an odd page, as described

% within the \textsf{pdfpages} package |\includepdfmerge| command

% documentation.

%    \begin{macrocode}

\define@key{thesis}{assignment}{%

  \def\thesis@assignmentFiles{#1}}