mastermind 0.1.4

Based off of the old board game. The user enters a number, which generates a hidden code comprised of that many colors (ROY G BIV + black/white), where duplicates are allowed. The user then has 12 attempts to guess what the code is. See the rest on GitHub.
Documentation
Build #106969 2018-06-28T01:29:18.114081+00:00
# rustc version
rustc 1.28.0-dev (b9bf4f162 2018-06-02)
# docs.rs version
cratesfyi 0.5.0 (579f83b 2018-03-05)

# build log
Updating registry `https://github.com/rust-lang/crates.io-index`
Downloading mastermind v0.1.4
Fresh rand_core v0.2.1
Fresh libc v0.2.42
Fresh rand v0.5.3
Documenting mastermind v0.1.4
Running `rustdoc --crate-name mastermind .cargo/registry/src/github.com-1ecc6299db9ec823/mastermind-0.1.4/src/lib.rs -o /home/cratesfyi/cratesfyi/doc -Z unstable-options --resource-suffix -20180602-1.28.0-dev-b9bf4f162 -L dependency=/home/cratesfyi/cratesfyi/debug/deps --extern rand=/home/cratesfyi/cratesfyi/debug/deps/librand-1174b04fc7dfb970.rlib --extern-version rand=rand,0.5.3`
warning: [FromEntropy::from_entropy] cannot be resolved, ignoring it...

warning: [thread_rng] cannot be resolved, ignoring it...

Finished dev [unoptimized + debuginfo] target(s) in 0.35 secs