added environment.tex

.gitattributes

@@ -74,6 +74,7 @@ doc/tex/cdi_cman.tex -text
 doc/tex/cdi_fman.tex -text
 doc/tex/cleanup -text
 doc/tex/dataset.tex -text
+doc/tex/environment.tex -text
 doc/tex/f_examples.tex -text
 doc/tex/f_grid.tex -text
 doc/tex/f_link.tex -text

doc/tex/environment.tex

+\chapter{\label{environment}Environment Variables}
+
+The following table describes the environment variables that affect {\CDI}.
+
+\definecolor{pcolor1}{rgb}{0.992, 0.980, 0.875}  % rgb: 253/250/223
+\definecolor{pcolor2}{rgb}{1.000, 0.925, 0.700}  % rgb: 255/236/278
+
+\begin{tabular}[t]{|>{\columncolor{pcolor1}}l|r|l|}
+\hline
+\rowcolor{pcolor2}
+%\cellcolor{pcolor2}
+{\bf Variable name}           &  {\bfseries Default} & {\bfseries Description} \\ \hline
+CDI\_INVENTORY\_MODE   &   None   &  Set to time to skip double variable entries.
+\end{tabular}