Several fixes and attempts to make improvements.

Samo Penic

2016-07-08 c7f52eada2cb8c1695afac6c7beed8fdda669288

 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;