Add EAM without explicit types and update fp for PBC atoms

Signed-off-by: Rafael Ravedutti <rafaelravedutti@gmail.com>

src/includes/atom.h

@@ -30,6 +30,7 @@ typedef struct {
     MD_FLOAT *x, *y, *z;
     MD_FLOAT *vx, *vy, *vz;
     MD_FLOAT *fx, *fy, *fz;
+    int *border_map;
     int *type;
     int ntypes;
     MD_FLOAT *epsilon;

src/includes/neighbor.h

@@ -37,4 +37,5 @@ extern void initNeighbor(Neighbor*, Parameter*);
 extern void setupNeighbor();
 extern void binatoms(Atom*);
 extern void buildNeighbor(Atom*, Neighbor*);
+extern void sortAtom(Atom*);
 #endif