multi config support (v2.0)

[AlexandrCe]

Hi, here is a multi API support (v2.0 for Laravel 5).

Each API configuration should be in a separate file, format is like in swaggerel.php now. You have to add an "additional" parameter to swagervel.php config file. There should be relative (in Laravel format) paths pointed to new configs:

...
    'additional' => [
        'swaggervel.api1', // config/swaggervel/api1.php
        'swaggervel.api2', // config/swaggervel/api2.php
        'swaggervel.api3', // config/swaggervel/api3.php
    ]
...

A new "api-docs-route" and "active" options was added.

_How it works_

Different API controllers are stored in different paths:

app/controllers/json/api1
app/controllers/json/api2
app/controllers/json/api3

You need to add 3 config files into app/config/ or config subdirectory:

api1.php
api2.php
api3.php

Config file format is the same as before, but need to exclude other APIs using 'excludes' param. For example, api1.php:

...
    "excludes" => array(
        app_path()."/storage",
        app_path()."/tests",
        app_path()."/views",

        app_path()."/controllers/json/api2",
        app_path()."/controllers/json/api3",
    ),
...

Another bugfix with an annotations file extention. It is failing when "resourcePath" of @swg\Resource has a dot inside.