Use ⋮ instead of ．．． when vertical

[Juan0952]

．　
．
．
versus
⋮
Is more like a suggestion than an issue, but would be cleaner to make the code replace 3 dots in vertical with the Vertical Ellipsis “⋮” character or to read them together already. Using the dots separated ocupe too much space and makes the column all messy.

Can look dumb, but an separated suggestion is to describe what kinda of files the Mokuro is compatible with in the read me, took me some time to realize it was jpg instead of pdf. Maybe in the future integrate an auto turn pdf into jpg feature into Mokuro! Anyways thanks, awesome job!