Traveler API

This code is still being tested. If you are using it, let me know if you run into any problems.

Traveler is a general-purpose tool for moving your creeps around.

single-lane creep movement

####Features:

Efficient path-caching and CPU-use (you can see how it compares with creep.moveTo() here)
Ignores creeps in pathing by default which allows for fewer PathFinder calls and single-lane creep movement
Detects hostile rooms and will path around them once discovered
Effective long-range pathing
Lots of options (read below)

`travelTo(creep, goal, [options])`

Move creep to goal.

creep: Creep The creep you want to move.
goal: Object Object with a property { pos: RoomPosition }.
options: Object
ignoreRoads: boolean Creeps won't prefer roads above plains (will still prefer them to swamps). Default is false.
ignoreCreeps: boolean Will not path around other creeps. Default is true.
ignoreStuck: boolean Will not path around other creeps even if stuck. Default is false.
ignoreStructures: boolean Will not path around structures. Default is false.
preferHighway: boolean Creep prefer to travel along highway (empty rooms in between sectors). Default is false
allowHostile: boolean Hostile rooms will be included in path. Default is false.
allowSK: boolean SourceKeeper rooms will be included in path. (if false, SK rooms will still be taken if they are they only viable path). Default is false.
range: number Range to goal before it is considered reached. The default is 1.