Update README.rdoc
Update README.rdoc

Fixing ambiguity for bug #33 and #34

PikachuEXE/rspec-cells,CJBrew/rspec-cells,timoschilling/rspec-cells,apotonick/rspec-cells,timoschilling/rspec-cells,CJBrew/rspec-cells,PikachuEXE/rspec-cells,apotonick/rspec-cells