STYLE: changes to Time and TimeState

- update TimeState access methods

- use writeTime() instead of old method name outputTime()

- use deltaTValue() instead of deltaT().value()
  to avoids pointless construct of intermediate

src/functionObjects/phaseSystems/sizeDistribution/sizeDistribution.H

@@ -39,7 +39,7 @@ Description
     {
         type sizeDistribution;
         libs (reactingEulerFoamFunctionObjects);
-        writeControl    outputTime;
+        writeControl    writeTime;
         writeInterval   1;
         log             true;
         ...