Fixed potential memory issue in ROB.
Fixed includes for rob.hpp and rob_entry.hpp
Discovered issue : if ROB::getEntry called with an invalid ID it will reuturn
the end iterator. but it is not easy for the caller to check if its the end without being tightly coupled to the ROB implementation.
Merge branch 'tomasulo' of github.com:ah450/RiSC-16-Simulator into tomasulo
Added .travis.yml and removed unneeded include