Adaption of movement models and UAV models

Assert the (minimum) speed value is always equal or larger than zero.
Correct boundary setting for gaussian distribution.

PositionVector: Try to calculate distance towards the other given location/position if not the same type of PositionVector

# Conflicts:
#	src/de/tud/kom/p2psim/api/topology/component/ControllableLocationActuator.java
#	src/de/tud/kom/p2psim/impl/topology/component/UAVTopologyComponent.java

- removed dimension field (redundant, access through 'values' field
- updated toString(), now correctly working with dimensions > 2

Abstract Topology Component now informs location listeners only when a certain location offset is reached
ControllableLocationActurator extends LocationSensor interface to provide location update requests

- removed dimension field (redundant, access through 'values' field
- updated toString(), now correctly working with dimensions > 2

Static & Gaussian Distributions