checking for null or empty param before set
adding a simple test case
changing lucas' suggestions
Fixing wrong collection converter behavior with more than one element.
Refactoring test.
Refactoring test.
Merge pull request #667 from renanigt/fixinCollectionsConverterBehavior

Fixing collections converter behavior with more than one element.
adding vraptor-java8 plugin on EN page
adding vraptor-java8 plugin on PT page
using protected instead
Merge pull request #670 from caelum/fixingBlankProjectConstructor

using protected on vraptor-blank project default constructor
adding Otavio's description
Merge pull request #631 from caelum/nullHeaderParams

fixing problem with null headers
Merge pull request #669 from caelum/addingVRaptorJava8Plugin

Adding vraptor-java8 plugin on docs