public / sequelize

Conflicts:
	lib/dialects/postgres/query-generator.js

All dialect implementations re-implemented escaping, resulting in
(roughly) the same code being written four times in the codebase. This
moves all of that into SqlString.

Use moment for better postgres timestamp strings

Fix for many-to-many associations being impossible between models with custom table names

Fix quotation escape in postgres where conditions

SQLite was defaulting to the MySQL backslash-escaped style, but it uses
postgres-style escaping. This is a SQL-injection vulnerability, and
shouldn't be taken lightly (although SQLite is mostly for testing).

Fix HSTORE encoding by using pg-hstore library.

… (removes errors about the use of reserved keywords

hasMany setter uses bulk create and destroy to create and remove associations

Fixes #644