Added test case for Protocol class.
Added test case for Protocol class.

This test case mocks out the Connection class and tests that the two
classes interface properly.

coffeine-009/vdebug,sumyfly/vdebug,benjifisher/vdebug,paprykarz/vdebug,sumyfly/vdebug,joonty/vdebug,joonty/vdebug,mispencer/vdebug,coffeine-009/vdebug,tjwallis/vim,tjwallis/vim,jerray/vdebug,mispencer/vdebug,paprykarz/vdebug,Taluu/vdebug,tjwallis/vim,jerray/vdebug,AndBicScadMedia/vdebug,mispencer/vdebug,Taluu/vdebug,Taluu/vdebug,tjwallis/vim,joonty/vdebug,benjifisher/vdebug,AndBicScadMedia/vdebug,tjwallis/vim,jerray/vdebug,benjifisher/vdebug,paprykarz/vdebug,AndBicScadMedia/vdebug,coffeine-009/vdebug,sumyfly/vdebug