Fixes #644
hasMany setter uses bulk create and destroy to create and remove associations
Update changelog
Change janmeier contact info
Fix typo
Update attributes for single linked associated objects
notes about 2.0.0
Merge pull request #689 from janmeier/pgID

Fixes #644
Sneaky tests for has many optimizations
Remove lodash dep. in has-many spec
Add assertions for generated SQL
Add assertions for generated SQL
Fix typo in has-many spec
Merge pull request #690 from janmeier/hasmanyOptimization

hasMany setter uses bulk create and destroy to create and remove associations