public / sequelize

Fix instance reload doesn't set to null a destroyed include

Conflicts:
	changelog.md
	lib/instance.js

Rename Instance private options and __options

add beforeRestore/afterRestore hooks

Conflicts:
	changelog.md

Sequelize version number as property of sequelize

Set a default options value for QueryInterface.prototype.bulkInsert

Update getting-started.md

Fix transaction section link in model doc

Update models-usage.md

Find* was refactored and uses only one options object from now on.

make it clear that there should be one sequelize instance per database

- Possibly fix #4423
- Rename Instance `options` to `$options` to prevent value
  overwriting with models that have a column named `options`
- Also rename Instance `__options` to `$modelOptions` to avoid confusion
  between $options and __options.

feat(model/attributes): return type and dependency fields for VIRTUAL

groupJoinData checks UniqueKeys if no PrimaryKey is set

When nesting associations, if the model doesn't have a primary key,
the code will now check and see if there is at least one unique key,
and if there is, it will use one to create the hash that identifies
each different row of results.

comma is making object invalid json

typo in post model options example

[ci skip] 📝 Added details about "unique" property (closes #4329)