Please add support for nested embeddables

[snazy]

I'd like to have support for nested embeddables like the following.

@NosqlEntity public class A { @NosqlEmbedded List b; }

@NosqlEmbeddable public class B { @NosqlEmbedded List c; }

@NosqlEmbeddable public class D { @NosqlEmbedded E d; }

@NosqlEmbeddable public class E { int someValue; }

[deanhiller]

yup, we have been quite a bit busy with our paying clients, sorry about that, but naturally the cashflow needs to come first so we can keep development going on playorm.