Visiting the login page while logged in will redirect you to the command center now.

Added php and javascript functions called "hex_distance" for calculating the distance between two hex coordinates in lib.php and javascript/lib.js.

ajax/scripts/dispatch_fleet.php:
1) Updated mission assignment to correspond with the current database design.
2) Calculates the travel distance, travel time duration, and arrival time.

Fixed a typo in classes/World_Object.php

Fixed a typo in classes/Colony_Building.php