Validate APK 1.1.8

Validate validates the parameters of a trajectory via the Point of Impact (PoI) at a chosen target range. Given four of the (measured) Muzzle Velocity, Ballistic Coefficient, Zero Range, Sight Height and ambient temperature/pressure, estimate the unknown parameter(s) and Validate will calculate a number of useable correction values from a 'PoI @ Target range' measurement.