multi api support

Hi, here is a multi API support. 

Each API configuration should be in a separate file, format is like in app.php now. No needs app.php for now, it could be any name of a API config file.

A new "api-docs-route" option was added. 

Needs to use getSettings method to get a configuration option.

***How it works***

You have several APIs:

`app/controllers/json/api1`
`app/controllers/json/api2`
`app/controllers/json/api3`

You need to add 3 config files into app/config/packages/jlapp/swaggervel:

`api1.php`
`api2.php`
`api3.php`

Set up API settings and exclude other api paths. For example for api1.php will be

```
...
    "excludes" => array(
        app_path()."/storage",
        app_path()."/tests",
        app_path()."/views",

        app_path()."/controllers/json/api2",
        app_path()."/controllers/json/api3",
    ),
...
```