Wrote __init__ function for gridObject in classes/gridObj.py
    Peramiters are:
        x: the x position on the grid of this object
        y: the y position on the grid of this object
        linker: the linker this is attached to
    makes self.x = x
    makes self.y =y
    makes self.linker=linker
    addes itself to the linker

Imported gridObject to classes/__init__.py
Imported gridObject to __init__.py

Wrote test code for gridObject