updated picoTCP to 1.4.0, lowered build optimization levels to -O2, improved selftest

ext/picotcp/docs/user_manual/template_api.tex

@@ -0,0 +1,38 @@
+\section{MODULE}
+
+% Short description/overview of module functions
+
+
+\subsection{FUNCTION}
+
+\subsubsection*{Description}
+
+\subsubsection*{Function prototype}
+
+\subsubsection*{Parameters}
+
+\subsubsection*{Return value}
+
+\subsubsection*{Errors}
+
+\subsubsection*{Example}
+
+
+\subsection{FUNCTION}
+
+\subsubsection*{Description}
+
+\subsubsection*{Function prototype}
+
+\subsubsection*{Parameters}
+
+\subsubsection*{Return value}
+
+\subsubsection*{Errors}
+
+\subsubsection*{Example}
+
+
+\subsection{FUNCTION}
+
+% ...