Swagger command updates.
Behavior and usage updates.
Update PhpDocHandler.php

https://github.com/nelmio/NelmioApiDocBundle/issues/477
Added nested JMS groups exclusion
Impossible to access an attribute (\"custom_endpoint\") on a NULL variable

My setup obviously does not have a authentication property set. This change fixes the error.
Merge pull request #482 from mathielen/patch-1

Impossible to access an attribute (\"custom_endpoint\") on a NULL variab...
Merge pull request #472 from sroze/recursive-groups

Added nested JMS groups exclusion
Fix: 'items' parameter for collections in parameters.
Merge pull request #484 from bezhermoso/fix_items_for_collection_parameters

[Fix] 'items' parameter for collections in parameters.
Pass in parameter for late resolving.
Merge pull request #485 from bezhermoso/cache-param-handling-patch

Caching: Pass in parameters for late resolving
Only show request format dropdown when there are multiple formats
Merge pull request #486 from JeroenDeDauw/patch-1

Only show request format dropdown when there are multiple formats
Fix #486
add show/hide button and list/expand operations buttons on sections

add a new parameter default_sections_opened: false (default)
To start with sections opened or closed
Merge pull request #491 from jaugustin/feat-section-hide-show

 [DX] Sections enhancement #489
Merge pull request #478 from spolischook/patch-1

Disallow PhpDocHandler rewrite already existing/parsed "requirements" doc point
adding optional color codes for tags annotation
Merge pull request #440 from thenetexperts/tags-with-colors
Merge pull request #455 from bezhermoso/swagger-dump-command

api:swagger:dump update