Add operations and attributes at the end

[Matthias Schoettle]

Currently when adding an operation or attribute it gets added at the beginning. This should be changed to adding it at the bottom.

[Matthias Schoettle]

Resolved issue #37: Attributes and operations are always added at the end now. The handler interfaces were changed to not have the index as the parameter. However, the controller operations still expect the index, enforcing the handler to figure out the correct index.

→ <<cset 32416b61313e>>