Make this into its own "lib crate"

[gnzlbg]

Make this into a "library" crate that comes already preconfigured, that is:

• with anexamples/ directory
• with an benches/ directory that uses the bench crate
• with a tests/ directory with a test that uses quickcheck, another flamer, ...
• add travis-ci, appveyor, coveralls,
• with an extensive Cargo.toml file showing all the features
• with a .clippy.toml file
• with a "more comprehensive" .gitignore (e.g. for rustfmt .bk files)

Ideally, a user should just need to "turn things off" instead of searching the internet for how to turn them on.