Add specialized PrimitiveIterator combinator methods.

[Boereck]

Add a couple of extension combinator methods / terminal Methods to the PrimitiveIterator sub-interfaces.
The following methods seem to be the most interesting:

• static def boolean anyMatch(PrimitiveIterator.OfInt intIterator, IntPredicate test)

• static def boolean allMatch(PrimitiveIterator.OfInt intIterator, IntPredicate test)

• static def boolean noneMatch(PrimitiveIterator.OfInt intIterator, IntPredicate test)

• static def OptionalInt findFirst​(PrimitiveIterator.OfInt intIterator, IntPredicate test)

• static def OptionalInt findFirst​(PrimitiveIterator.OfInt intIterator)

• static def PrimitiveIterator.OfInt filter(PrimitiveIterator.OfInt intIterator, IntPredicate test)

• static def OptionalInt reduce(PrimitiveIterator.OfInt intIterator, IntBinaryOperator op)

• static def int reduce(PrimitiveIterator.OfInt intIterator, int identity, IntBinaryOperator op)

• static def boolean anyMatch(PrimitiveIterator.OfLong longIterator, LongPredicate test)

• static def boolean allMatch(PrimitiveIterator.OfLong longIterator, LongPredicate test)

• static def boolean noneMatch(PrimitiveIterator.OfLong longIterator, LongPredicate test)

• static def OptionalLong findFirst​(PrimitiveIterator.OfLong longIterator, LongPredicate test)

• static def OptionalLong findFirst​(PrimitiveIterator.OfLong longIterator)

• static def PrimitiveIterator.OfLong filter(PrimitiveIterator.OfLong longIterator, LongPredicate test)

• static def OptionalLong reduce(PrimitiveIterator.OfLong longIterator, LongBinaryOperator op)

• static def long reduce(PrimitiveIterator.OfLong longIterator, long identity, LongBinaryOperator op)

• static def boolean anyMatch(PrimitiveIterator.OfDouble doubleIterator, DoublePredicate test)

• static def boolean allMatch(PrimitiveIterator.OfDouble doubleIterator, DoublePredicate test)

• static def boolean noneMatch(PrimitiveIterator.OfDouble doubleIterator, DoublePredicate test)

• static def OptionalLong findFirst​(PrimitiveIterator.OfDouble doubleIterator, DoublePredicate test)

• static def OptionalLong findFirst​(PrimitiveIterator.OfDouble doubleIterator)

• static def PrimitiveIterator.OfDouble filter(PrimitiveIterator.OfDouble doubleIterator, DoublePredicate test)

• static def OptionalDouble reduce(PrimitiveIterator.OfDouble doubleIterator, DoubleBinaryOperator op)

• static def double reduce(PrimitiveIterator.OfDouble doubleIterator, double identity, DoubleBinaryOperator op)

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