More human readable dump

[RiderExMachina]

I made it so it's in MiB instead of KiB. Makes the game sizes more human readable and understandable. I also tried writing a percentage calculator, but that seems to be having a few minor difficulties. You can see those at 360 of main.cpp

[neobrain]

Thanks for the pull request, and sorry for the late reply - this PR slipped somehow slipped my inbox queue and I just accidentally "discovered" it.

Anyway, to get this merged, please:

• Fix the formatting. There are some improper whitespace changes that should be easy to fix by looking at how the existing code is formatted
• Merge your patches into a single one
• Drop the Readme change from this PR. It's unrelated and hence should go into a separate PR (but since it's a simple change, I just edited the Readme manually so you don't need to provide a separate PR in this instance)
• Fix the grammar and spelling mistakes in the code comments