In-game time flow when wandering around the town

[mrfatguy]

Please, implement the functionality of passing in-game time when player is in the town.

You should use 17.50x ratio meaning that for every 17 seconds of real time 300 seconds of in-game time (5 minutes or one change on the clock) must pass. Details: Game. Time and Date.

This task is for implementing time-flow only. There will be a separate task for implementing visual display of the passing time.