fix strftime('%u') windows

Merge pull request #6 from RockPhp/hotfix

strftime %u nao funfa no windao

Fix strptime windows and calendar

Merge pull request #4 from RockPhp/strptime-win

Strptime para windows

1.0.2-alpha.1: Merge pull request #2 from RockPhp/unit-tests

Unit tests

fix autoload

Merge pull request #1 from RockPhp/composer-autoload

Fix autoload path