Added writing to pycac restart file format

src/box.f90

@@ -5,7 +5,7 @@ module box
     implicit none 
 
     real(kind=dp) :: box_bd(6) !Global box boundaries
-
+    character(len=3) :: box_bc !Box boundary conditions (periodic or shrinkwrapped)
     !The subbox variables contain values for each subbox, being the boxes read in through some
     !command. Currently only mode_merge will require sub_boxes, for mode_create it will always 
     !allocate to only 1 sub_box
@@ -14,12 +14,19 @@ module box
     real(kind=dp), allocatable :: sub_box_ori(:,:,:)!Orientations for each of the subboxes
     real(kind=dp), allocatable :: sub_box_bd(:,:)!Boundaries for each of the sub_boxes
 
+
+    !Below are some simulation parameters which may be adjusted if reading in restart files
+    integer :: timestep=0
+    real(kind=dp) :: total_time=0.0_dp
+
+
     public 
     contains 
 
     subroutine box_init
         !Initialize some box functions
         box_bd(:) = 0.0_dp
+        box_bc = 'ppp'
     end subroutine box_init
 
     subroutine alloc_sub_box(n)