VTK added labeling of the timestep

Samo Penic

2016-07-08 8a1af86e7ccdd00e864b604e1f4dd9cfc031fbd7

 src/general.h

@@ -313,6 +313,7 @@
   ts_double R_nucleusX;
   ts_double R_nucleusY;
   ts_double R_nucleusZ;
   ts_double nucleus_center[3];
    ts_double area;
} ts_vesicle;