Creates a Request object with the specified HTTP or HTTPS URL and cache. 
      Syntax
         
         
            + 
            (
            id
            ) 
            
               requestWithURL
            
            : 
            (
            NSURL *
            ) 
            newURL 
            
               usingCache
            
            : 
            (
            id< CacheDelegate >
            ) 
            cache
         
      
      Parameters
         
         
            - 
               newURL – 
               object of NSURL class.
            
 
            - 
               cache – 
               object implementing CacheDelegate protocol.
            
 
         
       
      Returns
         instance of the Request class. 
 Request *request = [Request requestWithURL:[[NSURL alloc] initWithString:applicationEndpoint] usingCache:self];