Removed unused pb_rcheckable_t::dummy_frames variable.
Removed a probably wrong comment.
Made pb_rcheckable_t::set_backtrace be not templatized.
Removed some templatization in error.hpp.
Removed wrong SAMRSI.
Removed SAMRSI asking why wrapper_datum_stream_t and this ridiculous inheritance hierarchy existed.
Replaced counted_term_t type with templated protob_t type.