If <tt>writeall = 1</tt>, then subsequent saving of <tt>.cn</tt> files 
by <tt>writecn</tt> will contain much more information than the default, 
i.e. each atomic line will contain:

<p>
<tt>SR.x SR.y SR.z VSR.x VSR.y VSR.z EPOT_IND fixed TOPOL species group image</tt>

<p>
See <a href="http://micro.stanford.edu/wiki/Output_File_Formats_in_MD++#Configuration_.cn_File">wiki
page</a> for more details.
