Changes in code and README for easier compilation. May break something

Samo Penic

2023-01-24 a8e354c7fad70eb7fdfda62ec83faf1be6c4ed44

 src/energy.c

@@ -213,7 +213,7 @@
}

ts_double direct_force_energy(ts_vesicle *vesicle, ts_vertex *vtx, ts_vertex *vtx_old){
   if(fabs(vtx->c)<1e-15) return 0.0;
   if(fabs(vtx->direct_interaction_force)<1e-15) return 0.0;
//   printf("was here");
   if(fabs(vesicle->tape->F)<1e-15) return 0.0;

@@ -238,3 +238,7 @@
   return vesicle->tape->F*ddp;      
   
}

void stretchenergy(ts_vesicle *vesicle, ts_triangle *triangle){
   triangle->energy=vesicle->tape->xkA0/2.0*pow((triangle->area/vesicle->tlist->a0-1.0),2);
}