express backtrace as a LifecycleTask

[tomerd]

Should installing backtrace be expressed as a LifecycleTask which we automatically add when it's enabled

[hassila]

@tomerd should be sorted out with #87

[hassila]

I think this case can be closed after the discussion in #87 ?

[tomerd]

yes, I think backtraces are special enough so they should be installed as early as possible - at the init imo