Refinements

- added Utility class to group more and more non-agent specific
functions;
- tried to test the functionality and correctness using JUnit test
Merge branch 'master' of https://github.com/tianyeblack/MultiAgtGeomExplorSys

Conflicts:
	agentTrailGeomForm/Agent.java
	agentTrailGeomForm/AgentsTrail.java
	data/TOPY_MESH_POINTS_01.txt

multiagentgeometryexploringsystem/MultiAgentGeometryExploringSystem.java