Many changes to the code to allow internal pegs

Samo Penic

2016-07-13 90882f51387b945bc0f660d8b12200b2f48e80fa

 src/timestep.c

@@ -60,7 +60,6 @@
/* RANDOM SEED SET BY CURRENT TIME */
   epochtime=get_epoch();         
   srand48(epochtime);

   centermass(vesicle);
   cell_occupation(vesicle);
   vesicle_volume(vesicle); //needed for constant volume at this moment