Raised PHP-Version and added button element

Update config.php

Added button to the list of elements. #37

2.0.2

Added english translations

2.0.1

Updated requirements, now using the newest MCW, allowing the installation vor Contao 4

2.0.0

Removed old files

2.0.0-alpha2

Fixed wrong indention

1.2.0: Merge pull request #20 from tristanlins/feature/colorify

Add colors to identify start and end elements in backend listing.