Support alternative long line breaking styles

yapf supports:

```
def foo(aaaaaaaaaaaaaaaa, bbbbbbbbbbbbbbbb, cccccccccccccccccccc):

foo(bar(aaaaaaaaaaaaaaaa, bbbbbbbbbbbbbbbbbb, cccccccccccccccc), baz)

from foo import aaaaaaaaaaaaaaaaaaaaaaaaa, bbbbbbbbbbbbbbbbbb, cccccccccc
```

To be rewritten as:

```
def foo(aaaaaaaaaaaaaaaa, bbbbbbbbbbbbbbbb,
cccccccccccccccccccc):

foo(bar(aaaaaaaaaaaaaaaa,
bbbbbbbbbbbbbbbbbb,
cccccccccccccccc),
baz)

from foo import (aaaaaaaaaaaaaaaaaaaaaaaaa, bbbbbbbbbbbbbbbbbb,
cccccccccc)
```

Could you add an option so it can optionally support:

```
def foo(
aaaaaaaaaaaaaaaa,
bbbbbbbbbbbbbbbb,
cccccccccccccccccccc
):

foo(
bar(
aaaaaaaaaaaaaaaa,
bbbbbbbbbbbbbbbbbb,
cccccccccccccccc
),
baz
)

from foo import (
aaaaaaaaaaaaaaaaaaaaaaaaa,
bbbbbbbbbbbbbbbbbb,
cccccccccc
)
```

As well ?