Move some functions of OCF to private

Move some functions of OCF to private

I was not sure whether the Orthodox Canonical Form dictates that the 4
functions be defined so I defined to be sure even though I did not think
it makes sense for Claptrap to have a copy constructor and assignment or
even a default constructor.
I learned that the methods only need to be present (in OCF), but need
not be usable. In C++11 I would delete the methods, in C++98 I have to
place the declaration inside private.