Use int type for SizeInBytes in file summary response

[chrisbodhi]

Closes #11

[jmoney]

Use int64

[jmoney]

Bonus points if you use unint, as you can't have negative bytes

[chrisbodhi]

Using int (or uint) is more portable, because Go will use either int32 or int64 under the hood, depending on the machine's architecture. I'll change it to uint.

[jmoney]

uint64

[chrisbodhi]

@jmoney Given my response above about portability, what's the upside of uint64 over uint? Also, what's our cap on dataset size? It's gotta be less than 2^64 bytes, yeah? 😁

[jmoney]

totally. just going with patterns. when you work in bytes typically you use 64bits. most libs accept 64bits for number of bytes and you'd do some weird conversions to get it there.

however you are right on portability, and the lib using 64bits is purely anecdotal so i rescind my request for 64 bits

[chrisbodhi]

I was too cool, and rebased instead of merging. 😑