Converted tests to PSR-2.
Added Symfony's filesystem component as a test dependency to remove our custom rmdir method.
Fixed #79: Fixed PSR-2 coding standards violations.
Fixed #78: Use ProcessUtils:: escapeArgument() in favor of escaleshellarg().
Fixed remaining PSR-2 coding violations.
$git->apply(...) method added.
Merge pull request #83 from EuKov/master

$git->apply(...) method added.
GitWorkingCopy: method "clean" added to proxy calls to "git clean".
Merge pull request #90 from EuKov/git-clean-command-impl

GitWorkingCopy: method "clean" added to proxy calls to "git clean".
Fixed whitespace error.
Fixed #88: Sometimes output is sent to STDOUT when errors occur instead
of STDERR

Conflicts:
	test/GitWrapper/Test/GitWorkingCopyTest.php
Removed unnecessary use command.
Fixed #89: Test PHP 5.6
Merge branch 'master' into 62-logger-listener

Conflicts:
	composer.json