MCPE changed the NBT format

[NiclasOlofsson]

MiNET rely heavily on fnbt for all things NBT. Mostly because of its exceptional speed. Now, with the release of Minecraft Pocket Edition 0.16, Mojang changed the encoding of int to use google protobuf varint instead. Can you consider adding these changes to fnbt as an option.

If for instance would make the creation of NbtBinaryWriter (and reader) through a callback (factory) method, I could implement my own stuff without having to bother you with the details of the specific changes.

[mstefarov]

Thanks for letting me know. I will add an option in the next release.