Adding Scope, new class that acts as DI container and replaces the class initiation functions in Util class
Improves Scope, to include Restler as part of the scope using newly added set method
Improves Restler, to make use of Scope
Removes unneeded methods from Util as they are replaced by Scope
Improves Restler, to use Scope for storing apiClassInstance instead of hard coded reference