v1.1 Added 'Any' step type and 'hasEngines' parameter

Added support for "Any" step type (one of several steps)
Added support for "minMass" amd "maxMass" to "Any_Landmarks" step type
Added support for "hasEngines" test useful in combination with "minMass" for payload challenges
Step type Orbit with orbit type Esc now works for the Sun in the default solar system.