implemented Twig setting function
Merge pull request #10 from Rvanlaak/twig-extension

Added settings function to Twig extension
(This PR was squashed before being merged - closes #10.)
slightly improved previous commit
added some more .gitignore entries
improved wording of some comments
+ added Dutch translation
Merge pull request #12 from Rvanlaak/master

+ added Dutch translation
preparing release 1.2.0
added tests
slightly improved the README file

[skip ci]
remove settings before instead after each test
updated the Twig extension to use Twig_SimpleFilter and Twig_SimpleFunction
let Travis run tests with Symfony 2.5.x stable and 2.6.x dev
stop testing against PHP 5.3.3
improved PSR-0 mapping
unified XML indentation
added XSD to PHPUnit configuration
no need to backup globals for tests
simplified a test
made setting a section order optional for the Twig extension