title: OwnCloud enhance core features with App (eg. user registration)
body: <p>I started looking into OwnCloud app development to add some capabilities I would like to my server.  To me it seems like Apps can't modify anything like the Login page or User Management page.  Is this the case?</p>
  
  <p>I want to build a user registration app and would love to integrate it into the user management page (if not and it has to exist as its own app page not a big deal).  The one big problem I see so far is not being able to add a "Register" link to the login page.  I could just go in and add it to the source manually, but I would like to keep the App self contained so others can use it too.</p>
  
  <p>If this is not possible to do in an App I may just need to modify the core application and then see if they will accept my feature addition in a pull request.</p>
  
  <p>Thanks to anyone who can shed some light on this for me.  I don't want to waste my time trying to figure out how to do it with an App on the platform if it wont be doable.</p>