multiscale init filter
use periodic boundary condition
ran tester.ipynb
Merge branch 'no_A_no_dropouts' of https://github.com/chayut-t/grid_cells into no_A_no_dropouts
Merge branch 'no_A_no_dropouts' of https://github.com/chayut-t/grid_cells into no_A_no_dropouts

Conflicts:
	tester.ipynb
Merge branch 'no_A_no_dropouts' of https://github.com/chayut-t/grid_cells into no_A_no_dropouts