Merge pull request #4 from YuHChen/Toren

Toren
Implemented Time class.
Updated Time.h and Documentation.txt accordingly to match implementation details.
Made test for Time class.
Tested Time class, everything seems to work so far (needs reviewing!).
Added makefile and Driver.cpp
Started to read flight schedule file.
Missing adding Flights.
Fixed makefile
Errors in Time.cpp!
Merge pull request #5 from YuHChen/YuHeng

Implemented Time class.
Merge branch 'master' of https://github.com/YuHChen/MalAir into Toren
Added addCity function to Map