Removed some unneded files
Implement isEmptyValue function
Fixed PHPDoc
Merge pull request #5 from sdaoudi/master

Fixed PHPDoc
Merge pull request #4 from blankse/patch-1

Implement isEmptyValue function
Merge pull request #3 from crevillo/housecleaning

Removed some unneded files
Fix: Configuration class doesn't exist anymore
Merge pull request #6 from blankse/patch-1

Fix: Configuration class doesn't exist anymore
Removed twig file as is not used anywhere
Merge pull request #7 from crevillo/content-fields-twig-file

Removed twig file as is not used anywhere
Removed unneeded use statement
Merge pull request #8 from crevillo/unneded-use

Removed unneeded use statement in MatrixTest