maybe-owned 0.3.3

provides a `MaybeOwned` (and `MaybeOwnedMut`) type similar to std's `Cow` but it implements `From<T>` and `From<&'a T>` and does not require `ToOwned`
Documentation
language: rust
rust:
  - stable
  - beta
  - nightly
matrix:
  allow_failures:
    - rust: nightly
script:
  - cargo build --verbose
  - cargo test --verbose
  - cargo build --all-features --verbose
  - cargo test --all-features --verbose