cpp interpreter

[tomhea]

Make a very fast cpp interpreter. can use parallel_flat_hash_map as the memory.

• [x] support IO, alignment check, and non-aligned interpreter.
• [ ] support compiler flags
• [ ] support breakpoints and debugging (show ip, f, j)

[tomhea]

cpp interpreter works :) uses the following submodules:

• parallel-hashmap (for the parallel_flat_hash_map)
• argparse

[tomhea]

moved to its own repo fji-cpp, and supports version 0,1,2.