Port-an-existing-app-to-OOD.md

-* Rails 4.1.15+
-* Use rubygems.org gems when possible
-* Dataroot changes
-
-Due to changes in the OOD gems, OOD applications will need to have a minimum Rails version of **`4.1.15`**, you can also update to the latest version of Rails **`4.2`**.  Rails 5.0 is not yet supported.
+Due to changes in the OOD gems, OOD applications will need to have a _minimum_ Rails version of **`4.1.15`**, you can also update to the latest version of Rails **`4.2`**.  Rails 5.0 is not yet supported.
 
 We will be replacing the `awesim_rails` gem with the `ood_appkit` gem, and updating the rest of the OOD dependencies to work with the latest version of OodAppkit.
 
@@ -44,6 +40,11 @@ Update OSC gems
 
 Add `ood_appkit`, `pbs`, and `awesim_branding` gems
 
+For details, see:
+[ood_appkit](https://github.com/OSC/ood_appkit/)
+[pbs](https://github.com/OSC/pbs-ruby)
+[awesim_branding](https://github.com/AweSim-OSC/awesim_branding)
+
 ```diff
 +gem 'ood_appkit', '~> 0.3.0'
 +gem 'pbs', '~> 2.0'
@@ -59,6 +60,8 @@ Remove `awesim_rails` and `awesim_rails_logging` gems, these are not supported o
 
 #### 3. Find all references to `AwesimRails` in the app code and modify to `OodAppkit`
 
+##### Note particularly any references to `AwesimRails.dataroot`, which is now handled by `OodAppkit.dataroot`
+
 Examples:
 
 ```diff