Adding 2016 start using Rust.

2016/twenty16/target/debug/build/proc-macro2-230b3c0ba67a9d07/build_script_build-230b3c0ba67a9d07.d

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+/Users/danchadwick/Projects/advent-of-code/2016/twenty16/target/debug/build/proc-macro2-230b3c0ba67a9d07/build_script_build-230b3c0ba67a9d07: /Users/danchadwick/.cargo/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.92/build.rs
+
+/Users/danchadwick/Projects/advent-of-code/2016/twenty16/target/debug/build/proc-macro2-230b3c0ba67a9d07/build_script_build-230b3c0ba67a9d07.d: /Users/danchadwick/.cargo/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.92/build.rs
+
+/Users/danchadwick/.cargo/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.92/build.rs:

2016/twenty16/target/debug/build/proc-macro2-ae14d8c29301e23b/invoked.timestamp

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+This file has an mtime of when this was started.

2016/twenty16/target/debug/build/proc-macro2-ae14d8c29301e23b/output

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+cargo:rustc-check-cfg=cfg(fuzzing)
+cargo:rustc-check-cfg=cfg(no_is_available)
+cargo:rustc-check-cfg=cfg(no_literal_byte_character)
+cargo:rustc-check-cfg=cfg(no_literal_c_string)
+cargo:rustc-check-cfg=cfg(no_source_text)
+cargo:rustc-check-cfg=cfg(proc_macro_span)
+cargo:rustc-check-cfg=cfg(procmacro2_backtrace)
+cargo:rustc-check-cfg=cfg(procmacro2_nightly_testing)
+cargo:rustc-check-cfg=cfg(procmacro2_semver_exempt)
+cargo:rustc-check-cfg=cfg(randomize_layout)
+cargo:rustc-check-cfg=cfg(span_locations)
+cargo:rustc-check-cfg=cfg(super_unstable)
+cargo:rustc-check-cfg=cfg(wrap_proc_macro)
+cargo:rerun-if-changed=build/probe.rs
+cargo:rustc-cfg=wrap_proc_macro
+cargo:rerun-if-env-changed=RUSTC_BOOTSTRAP

2016/twenty16/target/debug/build/proc-macro2-ae14d8c29301e23b/root-output

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+/Users/danchadwick/Projects/advent-of-code/2016/twenty16/target/debug/build/proc-macro2-ae14d8c29301e23b/out

2016/twenty16/target/debug/build/syn-869bd37a98fde7c7/build_script_build-869bd37a98fde7c7.d

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+/Users/danchadwick/Projects/advent-of-code/2016/twenty16/target/debug/build/syn-869bd37a98fde7c7/build_script_build-869bd37a98fde7c7: /Users/danchadwick/.cargo/registry/src/index.crates.io-6f17d22bba15001f/syn-1.0.109/build.rs
+
+/Users/danchadwick/Projects/advent-of-code/2016/twenty16/target/debug/build/syn-869bd37a98fde7c7/build_script_build-869bd37a98fde7c7.d: /Users/danchadwick/.cargo/registry/src/index.crates.io-6f17d22bba15001f/syn-1.0.109/build.rs
+
+/Users/danchadwick/.cargo/registry/src/index.crates.io-6f17d22bba15001f/syn-1.0.109/build.rs:

2016/twenty16/target/debug/build/syn-b3188c72134a4f7c/invoked.timestamp

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+This file has an mtime of when this was started.

2016/twenty16/target/debug/build/syn-b3188c72134a4f7c/output

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+cargo:rustc-cfg=syn_disable_nightly_tests

2016/twenty16/target/debug/build/syn-b3188c72134a4f7c/root-output

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+/Users/danchadwick/Projects/advent-of-code/2016/twenty16/target/debug/build/syn-b3188c72134a4f7c/out