MXImageView: use the new interface [setImageURI:...] instead of the deprecated one [setImageURL:...] .

Note - DirectoryServerTableViewCell:
Presently the thirdPartyProtocolInstance.icon is not a Matrix Content URI. We could not use here MXKImageView setImageURI method
 without breaking the instance icon rendering. We use the deprecated interface until this point is fixed on the server side.

Riot/Modules/Room/DataSources/RoomDataSource.m

@@ -304,7 +304,7 @@
                         if (roomMembers.count)
                         {
                             // Define the read receipts container, positioned on the right border of the bubble cell (Note the right margin 6 pts).
-                            MXKReceiptSendersContainer* avatarsContainer = [[MXKReceiptSendersContainer alloc] initWithFrame:CGRectMake(bubbleCell.frame.size.width - 156, bottomPositionY - 13, 150, 12) andRestClient:self.mxSession.matrixRestClient];
+                            MXKReceiptSendersContainer* avatarsContainer = [[MXKReceiptSendersContainer alloc] initWithFrame:CGRectMake(bubbleCell.frame.size.width - 156, bottomPositionY - 13, 150, 12) andMediaManager:self.mxSession.mediaManager];
                             
                             // Custom avatar display
                             avatarsContainer.maxDisplayedAvatars = 5;