Full write of constant volume plugin

Samo Penic

2019-03-08 7522b886602380764ce76f1d2244fad11bd1054f

 src/energy.c

@@ -240,5 +240,5 @@
}

void stretchenergy(ts_vesicle *vesicle, ts_triangle *triangle){
   triangle->energy=vesicle->tape->xkA0/vesicle->tlist->n*pow((triangle->area/vesicle->tlist->a0-1),2);
   triangle->energy=vesicle->tape->xkA0/2.0*pow((triangle->area/vesicle->tlist->a0-1.0),2);
}