title: sequelize with postgres database not working after migration from mysql
body: <p>I change MySQL databese into postgreSQL in sequelize. But After migration I have issue with upper and lowercase first letter in Table or Model...
  Before my MySQL version was working properly but after migration I got error message: 
  <code>500 SequelizeDatabaseError: relation "Users" does not exist</code></p>
  
  <p><strong>My User model:</strong></p>
  
  <pre><code>module.exports = function(sequelize, Sequelize) {
    var User = sequelize.define("User", {
      // profile
      userlevel: Sequelize.STRING,
      restaurant: Sequelize.STRING,
      access: Sequelize.STRING,
      optionsid: Sequelize.STRING,
      email: Sequelize.STRING,
      name: Sequelize.STRING,
      gender: Sequelize.STRING,
      location: Sequelize.STRING,
      website: Sequelize.STRING,
      picture: Sequelize.STRING,
      // Oauth
      password: {
        type: Sequelize.STRING,
        set: function(v) {
          var salt = bcrypt.genSaltSync(5);
          var password = bcrypt.hashSync(v, salt);
          return this.setDataValue('password', password);
        }
      },
      .....
  </code></pre>
  
  <p><strong>Migration file:</strong></p>
  
  <pre><code>"use strict";
  module.exports = {
    up: function(migration, DataTypes, done) {
      migration.createTable("users", {
        id: {
          allowNull: false,
          autoIncrement: true,
          primaryKey: true,
          type: DataTypes.INTEGER
        },
        userlevel: {
          type: DataTypes.STRING,
          defaultValue: '5'
        },
        restaurant: {
          type: DataTypes.STRING,
          defaultValue: ''
        },
        access: {
          type: DataTypes.STRING,
          defaultValue: '1'
        },
        optionsid: {
          type: DataTypes.STRING,
          defaultValue: ''
        },
        email: {
          type: DataTypes.STRING,
          allowNull: false
        },
        name: {
          type: DataTypes.STRING,
          defaultValue: ''
        },
        gender: {
          type: DataTypes.STRING,
          defaultValue: ''
        },
        location: {
          type: DataTypes.STRING,
          defaultValue: ''
        },
        website: {
          type: DataTypes.STRING,
          defaultValue: ''
        },
        picture: {
          type: DataTypes.STRING,
          defaultValue: ''
        },
        password: {
          type: DataTypes.STRING
        },
        facebook: {
          type: DataTypes.STRING
        },
        twitter: {
          type: DataTypes.STRING
        },
        google: {
          type: DataTypes.STRING
        },
        tokens: {
          type: DataTypes.STRING
        },
        resetPasswordToken: {
          type: DataTypes.STRING
        },
        resetPasswordExpires: {
          type: DataTypes.DATE
        },
        createdAt: {
          allowNull: false,
          type: DataTypes.DATE
        },
        updatedAt: {
          allowNull: false,
          type: DataTypes.DATE
        }
      }).done(done);
    },
    down: function(migration, DataTypes, done) {
      migration.dropTable("users").done(done);
    }
  };
  </code></pre>
  
  <p>If I change first letter of table in postgreSQL to uppercase everything is working properly... </p>