PhysicalEnvironment: object knows the position.
Rotation: changed the axis order to: {x,y,z}.
PhysicalEnvironemnt: added a kludge.
Environment: Changed sort kludge.

Moved sort to updateCanvas to work when viewAngle changes.
Added support back for 'x', 'y', 'z' viewAngle.
Environment: Extracted IObjectCache.
Merge: Followed recent changes.
Test: Followed recent namespace changes.
Mobility: Return NaN when max speed is not known.
Radio: Removed delete, parent figure supposed to do that.
Rotation: instead of calculating the inverse matrix we implemented a transposeMultiplication() function.
Test: Updated fingerprint after computeIntersection is fixed.
Radio: Renamed to TracingObstacleLoss and cleaned up.
Environment: Cosmetics.
Mobility: Fixed movement trail for 3D.
doc: updated docs to avoid a C++11 warning.
Radio: Ported breakpoint path loss model from mixim.
Radio: Ported UWBIR stochastic path loss model from mixim.
Radio: Ported IEEE 802.15.4 UWB IR radio from mixim.
Radio: Changed computation for reflection normal vector line length.
Environment: Added getters for viewAngle/viewRotation to environment.