Add hacking team test cases to our code
I renamed all of their test cases which have same name with our test cases (conflict)
All of the hacking team test cases are inside hackathon_test source folder
Merge branch 'master' of https://github.com/azatris/cs4218

# By Silver Taza
# Via Silver Taza
* 'master' of https://github.com/azatris/cs4218:
  Fixes found bugs
Repair bugs, and give explanation for the invalid test cases