Adding Debug model.
User has_many debugs.
Debug belongs to User.
When a Debug is created User is set to passed in User.
Debug belongs_to parent (Self referential).
Debug has_many children (self referential).
Adding Debug#eligible_parents
Insuring Debug#eligible_parents sorts by created_at DESC.
Adding DebugService#create_debug
Merge pull request #12 from bbommarito/feature/build_debug_service

Feature/build debug service