Implement preferred precisions.

- NEU: Für bestimmte Laborwerte ist die bevorzugte Nachkommastellenzahl hinterlegt (z.B. Kreatinin mit nur einer Nachkommastelle).

zaaReloaded2/Thesaurus/Parameters.cs

@@ -89,6 +89,18 @@ namespace zaaReloaded2.Thesaurus
             }
         }
 
+        /// <summary>
+        /// Returns the desired number of decimals for a given parameter.
+        /// </summary>
+        /// <param name="laurisName">Laboratory item to look up;
+        /// this must be an original Lauris string.</param>
+        /// <returns>Number of decimals for the parameter, or -1 if
+        /// undefined.</returns>
+        public int GetPrecision(string laurisName)
+        {
+            return LookUpValue(laurisName, 3, -1);
+        }
+
         /// <summary>
         /// Returns whether or not reference limits shall always
         /// be displayed for a given item, regardless whether it
@@ -99,7 +111,7 @@ namespace zaaReloaded2.Thesaurus
         /// <returns></returns>
         public bool GetForceReferenceDisplay(string laurisName)
         {
-            return LookUpValue(laurisName, 3, false);
+            return LookUpValue(laurisName, 4, false);
         }
 
         /// <summary>
@@ -112,7 +124,7 @@ namespace zaaReloaded2.Thesaurus
         /// false if not. Default is false.</returns>
         public bool GetIsBlacklisted(string laurisName)
         {
-            return LookUpValue(laurisName, 4, false);
+            return LookUpValue(laurisName, 5, false);
         }
         #endregion