Hill climber and a test client added

Simple Evolver (hill climber) added. Simple
client (float summator) added. Some additions
to the already existing Individual class are made.

	new file:   evolvers/__init__.py
	new file:   evolvers/hillClimber.py
	modified:   individuals/floatVector.py
	new file:   main.py
	modified:   tests/testFloatVectorWUnixPipe.py