related only needs to be on the model
fixing model.clone's relations
making the context of eagerFetch a bit less ambiguous
defaults: true option to update with defaults, otherwise defaults only used on save
working on the previousAttributes imp.
using Object.create(null) for user defined hashes
some Object.create(null)'s
finishing up previous attributes pieces
0.1.3
Merge branch 'master' into gh-pages

* master:
  0.1.3
  finishing up previous attributes pieces
  some Object.create(null)'s
  using Object.create(null) for user defined hashes
  working on the previousAttributes imp.
  defaults: true option to update with defaults, otherwise defaults only used on save
  making the context of eagerFetch a bit less ambiguous
  fixing model.clone's relations
  related only needs to be on the model