Added .has syntatic sugar to BoundExpectations 

i like to use FeatureMatcher's to extract data in tests for duplication removal, so given the following:

```java
expect.that(item).hasProperty("foo", equalTo("bar"));
```

As soon as this appears twice I will convert it to

```java
expect.that(item).is(foo(equalTo("bar")));
```

Where `foo` is a standard Hamcrest FeatureMatcher

With lambda-behave this doesn't read as nice and would prefer a `has` method, so the following would be what I write:

```java
expect.that(item).has(foo(equalTo("bar")));
```

This is a simple pass through to `is` in BoundExpectations