Related to https://github.com/open-source-parsers/jsoncpp/issues/458

b/c MS VS2010 is supposed to be C++11 but does not fulfull
the entire standard.

Resolves #410.
Re: #430.

See #411.
  http://paste.debian.net/378673/

Source : http://en.cppreference.com/w/cpp/language/override

Introduce 'allowSpecialFloats' for readers and 'useSpecialFloats' for writers, use consistent macro snprintf definition for writers and readers, provide new unit tests for #209

in case of embedded nulls

* use macros for logic errors, not input errors
* throw on parsing failure in `operator>>()`, not assert
* throw on malloc, not assert

And throw instead of return null for invalid settings.

We use Json::Value to configure the builders so we can maintain
binary-compatibility easily.

see issue #131

including `writeString()`

also, use withers instead of setters, and update docs