add missing includes
Merge pull request #47 from dwrensha/benchmark-include

add missing includes
a makefile for the benchmark
forget these dependencies
these too
statically link protobuf library. doesn't work otherwise
makefile fix; getting linker errors
update makefile for new library name
fix flag
link with kj
DNDEBUG
run_all script for comparison with capnproto-rust
use clang++ for non-protobuf benchmarks