Move crash handling to the application level and simplify class structure....
Move crash handling to the application level and simplify class structure.
Starting to try to take real advantage of the refactoring, to have generic
crash handling. This also lets us initialize the app without needing all
the self.attempt() wrappers, since now there's a good system-wide crash
handler at the app level (not inside the shell instance). I didn't yet
remove the attempt() method because we may have occasional uses for it (we
still do, but in one place only).
I also removed some extra class layers that weren't quite needed. Creating
classes solely for the purpose of passing parameters makes the code (IMO)
harder to understand, I kept getting lost in parts of the class hierarchy.
I think these changes provide the same flexibility but with easier to follow
code (less things to remember, basically). What I tried to do was to use
argument passing instead of inheritance for all cases I saw where the
inheritance wasn't really adding new functionality. In some cases, this
actually allowed me to remove methods that were effectively duplicated in
the subclasses.
