imeOptions attr support

```imeOptions``` is a second must after inputType, so if we already have ```nextFocusForward```, we don't have to specify ```actionNext``` via separate layout but just like this:
```xml
    <com.iangclifton.android.floatlabel.FloatLabel
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:imeOptions="actionNext"
        android:inputType="textEmailAddress"
        android:nextFocusForward="@+id/auth_password"
        app:editTextId="@+id/auth_email"
        />
```