Merge pull request #6 from Indatus/develop

Fixed issue with cron scheduler driver month February
Updated readme to address rcron
Merge pull request #10 from Indatus/develop

PHP 5.3 support
Update README.md

Fixed fifo.
Merge pull request #11 from Schnoop/patch-1

Update README.md
Merge pull request #12 from Indatus/develop

Improvements/fixes to scheduling
Corrected raw cron expression example
Merged master -> develop