Drab.Live making assumption about my app's module naming

[GBH]

This is the offending line: https://github.com/grych/drab/blob/master/lib/drab/live.ex#L306

I renamed ErrorHelpers and Drab started to explode. Wondering what's that all about.

[grych]

TODO:

create config entry with modules, defaulted to Router.Helpers, ErrorHelpers, Gettext

[grych]

Added the following config entry:

config :drab, live_helper_modules: {Router.Helpers, ErrorHelpers, Gettext}

also documented it in Drab.Live.