value to test
boolean indicating if a value is a probability array
var bool = isUnityProbabilityArray( [ 0.25, 0.5, 0.25 ] );
// returns true
var bool = isUnityProbabilityArray( new Uint8Array( [ 0, 1 ] ) );
// returns true
var bool = isUnityProbabilityArray( [ 0.4, 0.4, 0.4 ] );
// returns false
var bool = isUnityProbabilityArray( [ 3.14, 0.0 ] );
// returns false
Tests if a value is an array of probabilities that sum to one.