Set default invokesuper to 'inside' 

This sets the default `invokesuper` action to `inside`.  To be safe, I've added `invokesuper="before"` to every method without the attribute that does not already explicitly invoke `@super()` (this is the exact equivalent of the previous default setting).

Warning: This PR is/may be incomplete.  Please let me know if you find any places where swapping `before` for `inside` as the default `invokesuper` would cause issues.