Merge branch 'release/2.4.4' into develop
enhanced base extension with couple of new conventions

now there's no need to create own extension class
if you just want to define own services with DIC
configuration. Now you just can return extension
instance from extension file:

    <?php return new Behat\Behat\Extension\Extension(__DIR__);

this will load `ExtensionServices.(xml|yml)` from
the same directory in which this php file lives
slovak language
Merge pull request #209 from misiak/develop

Added Slovak (sk) language
Fixed the path to the vendor dir.

The path to behat inside the vendor dir is known and does not require
knowing the name of the vendor dir.
Fixes #186 and replaces #211
PT Language correction
Create `CONTRIBUTING.md` file
More details at: https://github.com/blog/1184-contributing-guidelines
Merge pull request #215 from danielcsgomes/develop

PT Language correction
Merge pull request #216 from stloyd/feature/contributing_file

Create `CONTRIBUTING.md` file
changing is_dir checks to file_exists + include
Merge pull request #229 from Haensel/develop

changing is_dir checks to file_exists + include
Added branch alias 2.4-dev and bumped Symfony version.
This should allow to install SymfonyExtension in Symfony 2.2. The Symfony version was updated in master branch but not in develop branch.
Merge pull request #233 from solzenic/patch-composer

Added branch alias 2.4-dev and bumped Symfony version.
Test against all major Symfony2 versions
Simplify versions list
Prefer sources (avoid github zipballs lock)
Fix broken scenario
Run 5.4-specific feature on 5.4 env
Fix run instruction
Do not show stack traces for pendings