Add support for array format

[sandermarechal]

Please add an additional 'array' format that serializes/deserializes PHP arrays. The implementation is trivial (it's basically just the generic visitor) but the format should be added to the default handlers.

[ffflabs]

+1 pretty pretty please.

Currently I have to serialize to json and json_decode to grab the properties array of an Entity.

[sandermarechal]

Yes, I do the same thing now.

[DanielBadura]

👍

[davidwindell]

See #20, no progress yet from what I can see unfortunately. The fork does work if you need it.

[renan]

👍

[goetas]

done in #435