Numeric Protocols naming to match Swift3, methods with mutable semantics marked as deprecated, and their correct counterparts added

[ambientlight]

Please note that in Swift, reverse()/subtract()/intersect() are mutable methods that are modifying current instance, instead of yielding a new modified one.

To match Swift3 semantics, reverse()/subtract()/intersect() has been marked deprecated and their immutable counterparts were added.

Also + overloaded operator added to Set/Array.

And please note the purpose of following added initializer

// our aggregate operations like .map, .filter will errase our collection type and yield ISequence
// so in order to have consistency with apple swift compiling
// we will do something like [String](fields.map(fieldNameWithRemovedPrivatePrefix)).someArrayFunc
public convenience init(_ sequence: ISequence<T>) {
       return self.init(sequence: sequence)
}