fixedSize() RIP (we don't need it for tupling any more)
Refactorings
Comment only
Restore zero-allocation by pooling BitStream2
Simple nullable schema implementation
FIXMEs
Checkpoint some horribleness (trailingDataBytes)
trailingDataBytes is ugly and doesn't work. I'm going to kill it.
Use pooled BitStream in more places
Null-free strings, bug fixes