-[BUG] Fixed eager loading for many-to-many associations. [#834](https://github.com/sequelize/sequelize/pull/834). thanks to lemon-tree
-[BUG] allowNull: true enums can now be null [#857](https://github.com/sequelize/sequelize/pull/857). thanks to durango
-[BUG] Fixes Postgres' ability to search within arrays. [#879](https://github.com/sequelize/sequelize/pull/879). thanks to durango
-[BUG] Find and finAll would modify the options objects, now the objects are cloned at the start of the method [#884](https://github.com/sequelize/sequelize/pull/884)
-[FEATURE] Validate a model before it gets saved. [#601](https://github.com/sequelize/sequelize/pull/601). thanks to durango
-[FEATURE] Schematics. [#564](https://github.com/sequelize/sequelize/pull/564). thanks to durango
-[FEATURE] Foreign key constraints. [#595](https://github.com/sequelize/sequelize/pull/595). thanks to optilude
