Update to Documentation and project description

Documentation fix in the description about stack management

Design Project now elaborates that the data set is supposed to
be ASCII characters.

documentation/architecture.tex

@@ -112,7 +112,7 @@ When interfacing the stack pointer manually, always adhere to the following rule
 \begin{itemize}
 \nolistskip
 \item When writing to the stack (push), always decrement the stack before writing your element.
-\item When reading from the stack (pop), read your element, then decrement the stack pointer.
+\item When reading from the stack (pop), read your element, then increment the stack pointer.
 \end{itemize}
 Only when adhering to these rules the integrity of the stack can be ensured.