Support Incremental Absorption and Squeezing

[itzmeanjan]

• Add support for incremental message absorption, in SHA3-{224,256,384,512} hashers 💪
• Add tests ensuring correctness of incremental message absorption property of hashers 💯
• Add support for collecting CPU cycles ( and cycles/ byte ) when benchmarked on machine running Linux kernel 🚀
• Get rid of Python dependency for testing conformance of this SHA3 implementation with spec 🎉
• Update project documentation ✍️

Run tests by issuing

make

Run benchmarks by issuing

# If you haven't built google-benchmark library with libPFM support. Should work on all OS.
make benchmark

# For obtaining CPU cycles and cycles/ byte, you must issue this command.
# And you must build google-benchmark library with libPFM support. Only available on Linux kernel.
make perf