[test][phpunit] Solution to get screenshot on failure for phpunit+mink tests. Refactors also FeatureConcext in the way it gets screenshot on failure.
[DB][Test][PHPUnit] Adds a solution for handling DB in phpunit test case
[Doc] Adds documentation for handling DB with phpunit tests§
[bin] Fixes run_tests.sh permission
[Doc][PHPUnit] Fixes a wrong method call. Improves docs.
[CS] CS fixes
Merge pull request #15 from kimu/phpunit-db-testcase

[test][phpunit] Solution to get screenshot on failure and handle DB for phpunit tests