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

ext/picotcp/docs/user_manual/chap_api_aodv.tex

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+\section{Ad-hoc On-Demand Distance Vector Routing (AODV)}
+
+
+AODV is a reactive routing protocol for mobile ad-hoc networks
+(MANETs). Its best fit are especially ultra-low power radio networks, 
+or those RF topologies where sporadic traffic between a small specific set
+of nodes is foreseen.
+In order to create a route, one node must explicitly start the communication
+towards a remote node, and the route is created ad-hoc upon the demand
+for a specific network path.
+AODV guarantees that the traffic generated by each node in order to create
+and maintain routes is kept as low as possible.
+
+\subsection{pico\_aodv\_add}
+
+\subsubsection*{Description}
+This function will add the target device to the AODV mechanism on the machine, 
+meaning that it will be possible to advertise and collect routing information 
+using Ad-hoc On-Demand Distance Vector Routing, as described in RFC3561, through the
+target device.
+
+In order to use multiple devices in the AODV system, this function needs to be called
+multiple times, once per device.
+
+\subsubsection*{Function prototype}
+\texttt{pico\_aodv\_add(struct pico\_device *dev);}
+
+\subsubsection*{Parameters}
+\begin{itemize}[noitemsep]
+\item \texttt{dev} - a pointer to a struct \texttt{pico\_device} specifying the target interface.
+\end{itemize}
+
+\subsubsection*{Return value}
+0 returned if the device is successfully added.
+
+\subsubsection*{Example}
+\begin{verbatim}
+
+ret = pico_aodv_add(dev);
+
+\end{verbatim}
+