Add log method to sequelize
Use new log method
Use the custom logging function if defined
Allow passing of winston options
Add centralized logging
Use the info event for common loggings
Revert "Use the info event for common loggings"

This reverts commit 85dfa296e0e54f2161854b8560777d3440d59016.
Don't depend on winston
Remove references to winston
Formatting
Recovered previously implemented behavior
Merged and modified PR #1610. Added test for using promises in validations, thanks to @callumacrae
Test for #1614
Eager Loading of non required but conditionable

Fixes #1614
Add filtering support to increment/decrement
Normalize isInsertQuery and isUpdateQuery
Fix typo in method name
return this from set
Merge pull request #1617 from seegno/refactor-pg-query

Normalize isInsertQuery and isUpdateQuery
Merge pull request #1618 from seegno/fix-typo

Fix typo in method name