Move most of the utils out of Chaplin core

[molily]

Most of the utils in Chaplin core are not used by Chaplin core itself and just blow up the lib size, so we should move them into the app-specific utils in the example repository (don’t know if this is the best place in the end, but that’s the place where they are needed at the moment).
Also, I’d like to change the signature of some of the Deferred helper methods to config hashes instead of 27 arguments.

[paulmillr]

this can be closed now I think