Update CONTRIBUTING.md

Author: corbett

CONTRIBUTING.md

@@ -21,6 +21,12 @@ One note, for programmers joining us from Java or similar language communities,
 ###UI conventions
 We prefer to use [Storyboards](https://developer.apple.com/library/ios/documentation/general/conceptual/Devpedia-CocoaApp/Storyboard.html) vs. building UI elements within the code itself. We are not at the stage to provide a .strings localizable file for translating, but the goal is to have translatable strings in a single entry point so that we can reach users in their native language wherever possible. 
 
+Some tips
+• any PR that does not use segues or story board conventions (red flags:   ```[self.navigationController pushViewController:<#(UIViewController *)#> animated:<#(BOOL)#>]``` and/or manual creation of UI elements and/or orphaned ViewControllers in the storyboard) will to be refactored prior to merge
+• the following are the storyboarder's best friends
+```- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender;```
+``` [self performSegueWithIdentifier:<#(NSString *)#> sender:<#(id)#>];```
+
 ## Tabs vs Spaces
 
 It's the eternal debate. We chose to adopt spaces. Please set your default Xcode configuration to 4 spaces for tabs, and 4 spaces for indentation (it's Xcode's default setting).