- Added brute force indexing support to ubcalc

- Added calculation of UB from 3 reflections to ubcalc
- Added calculation of lattice constants from UB to ubcalc
- Some fixes in stdscan in order to make the scripted scan work

cell.c

@@ -147,4 +147,31 @@ int calculateBMatrix(lattice direct, MATRIX B) {
   
   return 1;
 }
+/*--------------------------------------------------------------------------*/
+int cellFromUB(MATRIX UB, plattice direct){
+  MATRIX UBTRANS, GINV, G;
+
+  UBTRANS = mat_tran(UB);
+  if(UBTRANS == NULL){
+    return CELLNOMEMORY;
+  }
+  GINV = mat_mul(UBTRANS,UB);
+  if(GINV == NULL){
+    mat_free(UBTRANS);
+    return CELLNOMEMORY;
+  }
+  G = mat_inv(GINV);
+  if(G == NULL){
+    mat_free(UBTRANS);
+    mat_free(GINV);
+    return CELLNOMEMORY;
+  }
+  direct->a = sqrt(G[0][0]);
+  direct->b = sqrt(G[1][1]);
+  direct->c = sqrt(G[2][2]);
+  direct->alpha = Acosd(G[1][2]/(direct->b * direct->c));
+  direct->beta = Acosd(G[2][0]/(direct->a * direct->c));
+  direct->gamma = Acosd(G[0][1]/(direct->a * direct->c));
+  return 1;
+}