Merge pull request vlucas#277 from Korbeil/276-variable-values-starti…

…ng-with-are-being-converted-into-empty-strings

276 variable values starting with are being converted into empty strings

Added the list of environment variable declared inside the 'env' file (…

…vlucas#199)

Merge pull request vlucas#195 from vlucas/php71

Test on PHP 7.1

Various fixes

Merge pull request vlucas#172 from vinkla/patch-2

Update phpunit config

Tweaked git files

Moved brace onto new line

Various fixes

v2.0.0 release for proper namespacing and PSR-4 support