New interface components.
Support to find shortest path between two points on map.
INterface tweaks, new components.

Graph search improved, agent go to location, wander.
Merge branch 'master' of https://github.com/vitormota/AIAD_TP01 into vitor_branch

Conflicts:
	src/cityGarbageCollector/GCollector.java
	src/cityGarbageCollector/agent/CityBDI.java
	src/cityGarbageCollector/agent/CollectorBDI.java
	src/cityGarbageCollector/agent/ContainerBDI.java
	src/cityGarbageCollector/gui/City.java
	src/cityGarbageCollector/gui/Environment.java
Merge conflits.