Adding a number for the first lecture

Signed-off-by: Daniel Borchmann <daniel.borchmann@tu-dresden.de>

htw-201516/lecture-intro.tex → htw-201516/lecture-00-intro.tex

@@ -1,10 +1,9 @@
 \input{preamble}
+\subtitle{Einführung}
 \date{2015-11-09}
 
 \begin{document}
 
-\part{Einführung}
-
 \section{Wer sind wir (Daniel,  Tom)?}
 \begin{frame}[t]\frametitle{Dr.\,Daniel Borchmann und Tom Hanika}