Hi,
Put them in your resource folder. (App/resources). When building your project this folder is compiled in deployment/model/resources.
Hope this helps.
The correct place to add your file is <App>/resources . The contents from this folder is copied to <App>/deployment/model/resources when the project is build/deployed from the modeler.
The reason you do not see your file anymore is because the contents of <App>/deployment/ is
a) not commited to the team server, and is
b) overwritten when you build your project from the modeler.
-Andrej