refmove 0.1.1

# refmove: an experimental implementation of library-level by-move references

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This crate contains an experimental implementation of library-level
by-move references.

When [#50173][#50173] and [#53033][#53033] land in the compiler,
it will enable you to use `self: RefMove<Self>` to pass your trait
object by value, even without allocation.

[#50173]: https://github.com/rust-lang/rust/pull/50173
[#53033]: https://github.com/rust-lang/rust/pull/53033

See [#48055][#48055] for another approach to allow by-value trait objects.

[#48055]: https://github.com/rust-lang/rust/issues/48055

## Usage

### Borrowing

```rust
#![feature(nll)]
extern crate refmove;
use refmove::{Anchor, AnchorExt, RefMove};

...

// Borrowing from stack
let _: RefMove<i32> = 42.anchor().borrow_move();

// Borrowing from box
let _: RefMove<i32> = Box::new(42).anchor_box().borrow_move();
```

### Extracting

```rust
#![feature(nll)]
extern crate refmove;
use refmove::{Anchor, AnchorExt, RefMove};

...

fn f(x: RefMove<String>) {
    // Borrowing by dereference
    println!("{}", &x as &String);

    // Move out ownership
    let _: String = x.into_inner();
}
```