Minor Update v2.5.6

- Added time to game
- Time of day output has been added
- The time command has been added to help file
- WorldState class now has time attribute, recording number of minutes
in the day
- Player class now has DaysSinceSleep which records how long since the
player has slept
- DaysSinceSleep now effects speed and strength bonus'
- Sleeping sets time of day to 8am, recovers HP and sets days since
sleep to 0
- if Days Since sleep reaches 4 player dies.