public / sequelize

Postgres will now add enum's values on .sync() if you were to add
entires into the attribute's.value. It'll also add the enum type in
the proper order. For example:

```js
Table = sequelize.define...
  mood: {
    type: DataTypes.ENUM,
    values: ['happy', 'sad']
  }

// For some reason down the road you redefine the same table
// ...
  mood: {
    type: DataTypes.ENUM,
    values: ['neutral', 'happy', 'sad', 'joyful']
  }
```

Will result in the following SQL:

```sql
ALTER TYPE "...enumTypeName..." ADD VALUE 'neutral' BEFORE 'happy';
ALTER TYPE "...enumTypeName..." ADD VALUE 'jouful' AFTER 'sad';
```

- ```.drop()``` will now pass the options object through (optional)
- Added Postgres.QueryGenerator.pgListEnums(tableName=null,
   attrName=null, options) which lists all of the ENUM types for
   Postgres, if you don't specify an attribute and tablename then
   Sequelize will list all of the Enums
- Added Postgres.QueryGenerator.pgEnumAdd(tableName, attr, value,
   options) which will alter the enum type and add values
- Added Postgres.QueryGenerator.pgEnumDrop(tableName, attr) which
   will drop the enum type
- Postgres.QueryGenerator.pgEnum() will no longer try to drop the
   type unless {force: true} within the ```.sync()``` commands
- Refactored ```QueryInterface.createTable()``` in order to allow
   Postgres to create enum types explicitly rather than from
   Postgres.```QueryGenerator.createTable()```
- Refactored QueryInterface.dropTable() -- same as ```createTable()```
   changes .. also {force: true/force} will now set options.cascade
- QueryInterface.dropAllTables() will now correctly add a quote
   identifier to table names for MySQL

Closes https://github.com/sequelize/sequelize/issues/546

Allows us to define our own timestamp columns.

Enum values can now be null

If the column allows null values, the validation for that column will be skipped
if the vale is null.

Closes https://github.com/sequelize/sequelize/issues/839

This commit allows the user to predefine their own timestamp columns which is
useful for databases that already exist. This also allows the user to have their
own naming conventions for the timestamp columns.

The following options have been added when defining a new table:

* createdAt (defaults to "createdAt")
* updatedAt (defaults to "updatedAt")
* deletedAt (defaults to "deletedAt")
* touchedAt (defaults to "touchedAt")

Note: The underscored option still remains useful since it's just a simple one
line option which allows flexibility for those rare cases in which people decide
to change the structure of their database from camelCase to under_score or
vice-versa.

Conflicts:
	lib/dialects/mysql/query-generator.js
	lib/query-interface.js
	lib/utils.js
	spec/dao-factory.spec.js

…andartsnl/sequelize into tandartsnl-bugfix/getterSetterPropertyInitialization

…urango-update-validations

…to janmeier-eagerloadedAttributes

Updated validator to 1.5.0 and chai-datetime to 1.1.1

Postgres was having trouble restablishing connections for non-pool clients closes #832

… times might be off slightly by a second or so when doing a comparison.

Postgres' connector-manager was only checking to see if this.client was null. We
should have been checking for "readyForQuery" status as well. We now make
this.client null if the connection has an error rather than just maintaining
stale information. This is to ensure that we retry our connection until we can
re-establish a firm connection.

This resolves issue #832 https://github.com/sequelize/sequelize/issues/832

Move the validation code to happen before the save funtion checks for enums being out of range.  This way the enum validators can catch the error and raise the event instead of throwing an error that breaks execution.