Add new rebar binary and erlydtl opts info toplevel rebar.config for solving dialyzer glitches

Applying the pull request will solve the dialyzer glitches caused by ErlyDTL templates and Protobuff `.proto` files, shown as the errors below:

    dialyzer: Could not get abstract code for file:   /home/kenji/src/riak/deps/riak_control/ebin/index_dtl.beam (please recompile it with   +debug_info)

    dialyzer: Could not get abstract code for file: /home/kenji/src/riak/deps/riak_core/ebin/riak_core_pb.beam (please recompile it with +debug_info)