In TextRebuildApp, table columns are zero-based, subtract 1 from the …

…column count.

refs #24

src/main/java/edu/hawaii/soest/pacioos/text/TextRebuildApp.java

@@ -179,7 +179,7 @@ public static void main(String[] args) {
             // Is the datetime column first or last?
             int firstDateField = Integer.parseInt(config.getDateFields(0).get(0));
             // Sort the table using the datetime field's corresponding index
-            int sortColumnIndex = firstDateField <= 1 ? 0 : mergedTable.columnCount();
+            int sortColumnIndex = firstDateField <= 1 ? 0 : mergedTable.columnCount() - 1;
 
             // Deduplicate and sort rows of the merged table
             sortedTable = deduplicateAndSortTable(mergedTable, sortColumnIndex);