continued lazy_btypes rust

btypes_lazy/src/main/rust/bmachine/Cargo.toml

btypes_lazy/src/main/rust/btypes/src/bset.rs

...azy/src/main/rust/btypes/src/lazy_ops/set_ops/identity.rs

btypes_lazy/src/main/rust/btypes/src/lazy_ops/set_ops/mod.rs

..._lazy/src/main/rust/btypes/src/lazy_ops/set_ops/setops.rs

...s_lazy/src/main/rust/btypes/src/lazy_ops/set_ops/union.rs