Issue #113: Model.create ignoring field and virtual setters

[buske]

This PR solves the problem by making the behaviour of feathers-sequelize's raw parameter consistent across service methods and take priority over the behaviour of sequelize's raw parameter for Model.create calls (in which raw means something completely different). It introduces a sequelize.ignoreSetters argument to control the shadowed Model.create raw parameter.

Without this PR, the following behaviour is observed:

• service.create(data) — setters ignored
• service.create(data, {raw: false}) — setters called, but DAO returned

The desired default behaviour is to have setters called but JSON returned, which this PR achieves. To get the native behaviour of calling Model.create({raw: true}), you can now call:
service.create(data, {sequelize: {ignoreSetters: true}})

This PR should be accompanied by a corresponding update to the docs to describe the new ignoreSetters argument: https://docs.feathersjs.com/api/databases/sequelize.html

[daffl]

Makes sense, thanks a lot @buske!

[daffl]

Released as v2.0.2