RsItem added some comment and more verbose error reporting
RsTypeSerializer added support for RsItem derived classes as members
added utility macros for better readability of the code and easier
handling of RsItem derived members
RS_REGISTER_SERIAL_MEMBER(I)
RS_REGISTER_SERIAL_MEMBER_TYPED(I, T)
RS_REGISTER_ITEM_TYPE(T)
RsNxsMsg::serial_process use new macros for better readability and to
have an exemple of usage with RsTlvItem derived class
Fix undefined reference to RsNxsMsg::print
GxsTrans is a generic transport service, use more generic name trans
instead of mail to avoid confusion
Renamed size(...) to seria_size(...) for costistence whit the codebase
Moved GxsTrans and related things to gxstrans directory
Removed outdated and now uncompatible gxsmail test service
Avoid expose internal items in public interface methods
