Add argument_implementation_type attribute to mapped types, and to function and method arguments

[PetrPPetrov]

Added argument_implementation_type attribute to mapped types, and to function and method arguments

It is valuable for callbacks, when a method has std_string argument which has implementation_type="std::string".

Bcapi generates the following template for callback implementator:
...
virtual void f1(std::string arg1)...
...

however, the base user class accepts only const std::string&:
...
virtual void f1(const std::string& arg1) = 0;
...

which causes problems.