fixes problems with dottie and raw queries
no more automatic nesting for raw queries, now have a flag
fixes tests
Merge pull request #2064 from jValdron/flag-dottie-raw-query

Flag dottie raw query
[ci skip] Add API docs and changelog entry for nest option to .query
Fix typo in _autoGenerated attribute for deletedAt. Closes #2071
[ci skip] Mention dialectOptions in sequelize constructor params
Support for specifying indexes on a model
Cleaning up indexes code a bit
Made addIndexQuery more DRY
Fix an issue with dialect.supports for abstract dialect being overwritten