Adding and removing things to the API

• If you want to add a system setting or anything to the API you need to run:
  

make update-api

• If you remove a system setting or anything from the API and end up with this error:
  

******************************
You have tried to change the API from what has been previously released in
an SDK. Please fix the errors listed above.
******************************
you need to run:

make update-api

if that doesn't do it edit "build/core/api/current.xml" and "build/core/api/1.xml" and make sure your setting is no longer there.