std.serialization

["Nordlöw"]

I believe it's worth the try to get Python-style serialization 
simplicity to D by default. We use Python cpickle at work and its 
fantastically simple and fast. It handles just about everthing 
you need by default as long as you have imported the modules that 
contain the types involved in the serialization.

It would attract more people from dynamical languages like Python 
if D got default-powers in std.serialization that does everything 
that msgpack does plus followings references.

This would make it possible to serialize arbitrary graph-likes 
structures with potential reference cycles. Resolving these 
cycles can be solved by using a map that contain a list of 
references/classs that already have serialized.

I'm however not sure how serialization of base and superclasses 
should be implemented in the most convenient way. Maybe somehow 
has a good suggestion for this.