structopt 0.3.4

Parse command line argument by defining a struct.
Documentation 
language: rust
matrix:
  include:
    - rust: 1.36.0
    - rust: stable
    - rust: beta
    - rust: nightly
    - rust: stable
      env: RUN=FMT
      before_script: rustup component add rustfmt-preview
      script: cargo fmt --all -- --check
script:
  - cargo test $FEATURES