Add Day 1 solution, in Rust
Merge branch 'day-7-part-2'
* day-7-part-2:
Implement Day 7 Part 1 and working on Part 2
Implement Day 7 Part 1 and working on Part 2
Currently stuck on concurrent interpreters. I think I'm going to
have to refactor my whole Intcode execution setup.
Get puzzle input, copy intcode interpreter from day 5
More verification that the Lisp code is doing the right thing (part 2)
Add part 1 in Python, used to verify that Part 1 in Lisp was doing
the right things
Finish solution for Day 5, parts 1 and 2
Add Rust implementation, for kicks
Solve both parts of Day 4
Refinements and solution for part 2