Use new index entry types

I've changed the script so that new Dash index entry types are used. I'll post the docset update to Dash soon.

These changes were made:
Interfaces were indexed as intf (which shows up as Protocol in Dash) - changed to Interface
Events were indexed as binding -> changed to Event
Packages were indexed as cat (which shows up as Category in Dash) - changed to Package

Note: The AS documentation has Constructors, which are currently indexed as Methods. Dash now also supports a Constructor type, but I could not find a way to differentiate them from methods. If you have any idea how to do that, let me know.