Version 1.0.0

Change log:

1. Added get, add, remove, set methods to the Client class
2. Created concrete selector classes (UserListSelector and UserListClientSelector)
3. Create Soap instant objects in Client class instead. As a result, Operation and selector class does not need a client instance before method build is called.

Breaking changes:

1. The Selector class has become internal. Concrete classes UserListSelector and UserListClientSelector should be used instead.
2. Selector classes constructors do not require a client object
3. Client object will build the selector internally. There's no need to call the build method on selector objects.