[FEATURE REQUEST] Ensure chip inputs/outputs are always aligned to grid

[FaustoNascimento]

As the image shows, the outputs of a chip are not always aligned to grid, even if the chip itself are (and in this instance the inputs are too).

Without looking at the code I imagine currently it's placing the first and last in "grid positions" and dividing the remaining space equally. But since that might not fall inside the grid, I think it's more useful to have the internal pins aligned to grid to facilitate wiring even if they're not "correctly spaced out" on the chip itself.