Added Time.h File
Merge pull request #2 from YuHChen/YuHeng

Added Flight interface to Documentation.txt
Merge pull request #3 from YuHChen/YuHeng

edit Flight interface
Merge https://github.com/YuHChen/MalAir into Toren
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!).