-(AlfrescoRequest *) searchWithKeywords:(NSString *)keywords
        listingContext:(AlfrescoListingContext *)listingContext
        completionBlock:(AlfrescoPagingResultCompletionBlock)completionBlock - Returns a
      paged list of people from the repository that matches the provided keywords. The search will
      match username, first name and last name.
    Parameters
- (NSString *) keywords
 - The space delimited list of keywords.
 - (AlfrescoListingContext *) listingContext
 - The listing context with a paging definition that is used to retrieve the search results.
 - (AlfrescoPagingResultCompletionBlock) completionBlock
 - The block that is called with the search results on completion of the operation. The completion block has the format typedef void (^AlfrescoPagingResultCompletionBlock)(AlfrescoPagingResult *pagingResult, NSError *error).
 
Returns
(AlfrescoRequest *)
Example