unify types

[saku-koodari]

type of 8-bit values is byte and
type of 16-bit value is ushort (in CPU) and int in Memory.

Also there is a few methods that we can combine, if every type would be int.

[saku-koodari]

At the moment is better that everything would be integer. If (host's) memory is the issue, then we must rethink this.

[saku-koodari]

This should do before we continue with #2

[saku-koodari]

When I looked GPU and Memory, maybe it would be better to leave their types what they are now.
I put this on hold for while.

[saku-koodari]

At the moment I think I should replace every ushort with int:
For now design > perfomance. int values is easier to handle, because you don't need to cast them, unlike ushort.

[saku-koodari]

However I am not sure, where I should convert every byte to int. Byte is (should be faster), but also it gives a visual clue, what kind of data they are holding

[saku-koodari]

This is actually duplicate issue with: #4 data type as ushort or int?