Recent GCC versions warn about using memcpy/memmove to
write to a class pointer (-Wclass-memaccess).

Avoid the warnings by casting to void* first.

Closes #1086.
Closes #1205.
Closes #1246.

Removing always true if condition

Detect C++11 features for Developer Studio

This patch enables various C++11 features if the code is compiled with
Developer Studio compiler version 5.14 or higher.

Rename a few internal preprocessor macros to avoid naming conflicts

Unit Test: Parsing "128.74836467836484838364836483643636483648e-336" causes a crash

Unit Test: Parsing "0e100" in full precision mode causes UB

Fix strtod

until I know what the normal-precision algorithm really does...

Some more need to be fixed.

=D

Do not use an approximation to do this. Instead check if the result is Inf.

If the buffer only contains zeros, return 0.

MSVC: Autodetect RAPIDJSON_HAS_CXX11_NOEXCEPT, RAPIDJSON_HAS_CXX11_TYPETRAITS

Avoid `MissingProperty` Error from `SchemaValidator` when a none-zero length value is given as `default` for the property

again, in relation to solving issue #784, use `SizeType`-typed variable to indicate a none-zero length string has been given in the schema as default value for the json property; added an unittest `Object_Required_PassWithDefault`

in relation to solving issue #784, this commit enables the schema to recognise the "default" property, and avoids a missing property error when a default is given in the schema