Hello,

First of all, this isn't really a merge request, cause the code is very inmature. Rather, I intend to start a discussion to get ideas to work on a good design that will allow Nested Type (De)Serialization.

The idea is to do similiar of what QDataStream does: create stream operators to serialize to a stream class (QJson::Stream at stream.h).
Like QDataStream, the user create his own class and the register it with QJson::registerType at stream.h (like qRegisterMetaTypeStreamOperators). And the user is also responsible to put his data on the stream through this operators. The class must has a QMetaType registered (using Q_DECLARE_METATYPE).

I've some tests to prove the concept: see them at teststream directory at tests.

Now comes the dirty part: we now javascript and qjon don't care about types. But C++/Qt depend on types specifically. So, I've arbitrarily chose a format to store them on the deserialization to be later parsed. It is:
"instance" :
{ "metatype" : "userclass",
"data" : { "field1" : "value1", "field2" : "value2"}

TODO:
- Fix CMakeLists.txt according to qmake .pro files modifications.
- Clean up.

That's it.
Cheers,
bráulio