How to change Migration Table name and use defined prefix.

Comparing #3 with #4

Content

[...]

```php
// Command Map
'commandMap'=>array(
'migrate'=>array(
'class'=>'system.cli.commands.MigrateCommand','
'migrationPath'=>'application.migrations',
'migrationTable'=>'{{migration_history}}',
'connectionID'=>'db',
'templateFile'=>'application.migrations.template',
),

[...]