latex: Moved definitions of subparagraph, header-includes.

`header-includes` now occurs before setting of title,
author, etc.  This allows you to include a definition of
`\subtitle`, for example, before `\subtitle` is called.

Redefining of `\paragraph` and `\subparagraph` now occurs
before `header-includes` rather than after.

default.latex

@@ -147,6 +147,18 @@ $if(numbersections)$
 $else$
 \setcounter{secnumdepth}{0}
 $endif$
+$if(subparagraph)$
+$else$
+% Redefines (sub)paragraphs to behave more like sections
+\ifx\paragraph\undefined\else
+\let\oldparagraph\paragraph
+\renewcommand{\paragraph}[1]{\oldparagraph{#1}\mbox{}}
+\fi
+\ifx\subparagraph\undefined\else
+\let\oldsubparagraph\subparagraph
+\renewcommand{\subparagraph}[1]{\oldsubparagraph{#1}\mbox{}}
+\fi
+$endif$
 $if(dir)$
 \ifxetex
   % load bidi as late as possible as it modifies e.g. graphicx
@@ -164,6 +176,9 @@ $if(dir)$
   \newenvironment{LTR}{\beginL}{\endL}
 \fi
 $endif$
+$for(header-includes)$
+$header-includes$
+$endfor$
 
 $if(title)$
 \title{$title$}
@@ -176,22 +191,6 @@ $if(author)$
 \author{$for(author)$$author$$sep$ \and $endfor$}
 $endif$
 \date{$date$}
-$for(header-includes)$
-$header-includes$
-$endfor$
-
-$if(subparagraph)$
-$else$
-% Redefines (sub)paragraphs to behave more like sections
-\ifx\paragraph\undefined\else
-\let\oldparagraph\paragraph
-\renewcommand{\paragraph}[1]{\oldparagraph{#1}\mbox{}}
-\fi
-\ifx\subparagraph\undefined\else
-\let\oldsubparagraph\subparagraph
-\renewcommand{\subparagraph}[1]{\oldsubparagraph{#1}\mbox{}}
-\fi
-$endif$
 
 \begin{document}
 $if(title)$