* added bool for nested_flatbuffer
setting bool flag nested_flatbuffer according to attributes
setting nested type
* added JSON serialization for nested flatbuffers
* simplified lookup of nested_flatbuffer StructDef
* added nested_flatbuffer parsing workound relying on flexbuffers
* moved nested flatbuffer parsing into its own function for clarity
removed flexbuffers workound to simplify and speed up nested_flatbuffer parsing
added support for 'legacy' nested_flatbuffers, ubyte arrays
* inlined functions for nested parser init/clean since only used once
* whitespace formatting
* changed type of FieldDef.nested_flatbuffer from bool to StructDef*
removed subsequent type lookups
* removed copies of unrequired data when initializing nested parser
* applied changes requested by reviewer
* removed superfluous lookup of nested_flatbuffer field attributes
* renamed camelCased variables to snake_case
* Added support for serializing native_type with CreateVectorOfNativeStructs
* Added support for serializing native_type with CreateVectorOfSortedNativeStructs
* Added C++ code generation for vectors of native_types
Christian Helmich