Move src/bin/* to examples

[igor-raits]

Is there any reason to be able to do cargo install those binaries?

[oconnor663]

I should make the tests that use these integration tests rather than unit tests, so that the binaries get built automatically and we don't need the path_to_exe hack. Anyway, I was under the impression if you wanted tests to have access to binaries, they needed to be in src/bin/. Is that wrong?

[igor-raits]

tbh, I don't know how to make tests to access binaries.