The current solution for #1 would be to link to your rebar:
First check if you have rebar in your path by doing "where rebar" (assuming this is a bash UNIX shell)
If it does give a path, go to the CloudI src directory, "rm rebar" and "ln -s <path-to-rebar>", then it is best to "rm -rf ../cloudi_install; make clean && make && make install". That way your version of rebar can do the build/installation. It isn't very common to have rebar installed locally, so I didn't test that situation.
The current solution for #2 is to go to the CloudI src directory and do "rm -rf rel/cloudi", then "make install".
Tell me if this doesn't solve the problem, or if you find other issues.
Thanks,
Michael