Lua Computer: collection of minor updates, none notable (read romapidoc)

Former-commit-id: 3ad3a1432f67148aa1a412ca1cdfb628423f6ad7
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work_files/romapidoc/api_hexutils.tex

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+The Hexutils library provides utility to convert byte value to hexadecimal string.
+
+\subsection{Functions}
+
+\begin{tabularx}{\textwidth}{l l X}
+	\textbf{\large Function} & \textbf{\large Return} & \textbf{\large Description}
+	\\ \\
+	\endhead
+	hexutils.toHexString(\textbf{bytes}: string) & string & Converts byte array to the string of its hexadecimal representations.
+\end{tabularx}