added support for variable sized grid spacing

updated the internal API for how grids are constructed to simplify the code

binarycpython/utils/spacing_functions.py

@@ -6,8 +6,9 @@ Tasks:
 """
 
 from typing import Union
-import numpy as np
 import math
+import numpy as np
+import sys
 
 def const(
     min_bound: Union[int, float], max_bound: Union[int, float], steps: int