Matrix/vector algebra functions return reals

This follows from modelica#622 and reverts dc7ad4e

chapters/arrays.tex

@@ -463,9 +463,10 @@ \subsubsection{Reduction Expressions}\label{reduction-expressions}
 
 \subsection{Matrix and Vector Algebra Functions}\label{matrix-and-vector-algebra-functions}
 
-The following set of built-in matrix and vector algebra functions are available.  The function transpose and symmetric can be applied to any matrix.
-The functions \lstinline!outerProduct!, \lstinline!cross! and \lstinline!skew! require \lstinline!Real!/\lstinline!Integer! vector(s) or matrix as input(s)
-and returns a \lstinline!Real!/\lstinline!Integer! vector or matrix (the result is only \lstinline!Integer! if the input/all inputs are \lstinline!Integer!):
+The following set of built-in matrix and vector algebra functions are available.
+The function transpose can be applied to any matrix.
+The functions \lstinline!outerProduct!, \lstinline!symmetric!, \lstinline!cross! and \lstinline!skew! require \lstinline!Real!/\lstinline!Integer! vector(s) or matrix as input(s)
+and returns a \lstinline!Real! vector or matrix:
 \begin{longtable}[]{|p{3.5cm}|p{11.5cm}|}
 \caption{Matrix and vector algebra functions.}\\
 \hline