Fixed permission bugs on file picker

Merge branch 'develop'

* develop:
  fixed gif file
  fixed permission problems on file selector

Optimized for Contao 4+

Merge branch 'develop'

* develop:
  fixed dependencies

1.6.0: Merge branch 'develop'

* develop:
  #123 added first image support
  #115 added meta support for pa2_image template
  optimized css rules for grid
  refactored all input statements
  fixed autoload registration
  #129 added php7 support by fixing String to StringUtil
  removed xhtml support

1.5.2: Merge branch 'develop'

* develop:
  #117 optimized permissions
  #132 fixed missing css definitions
  #114 fixed empty headline
  removed disabled runonce file
  auto reformatted code
  #121 added check to back button
  #127 fixed user bugs
  fixed #133

1.5.1: Merge branch 'develop'

* develop:
  optimized translation
  fixed loading data container
  fixed problem with albums and translation fields

Relocated iCodr8 to Craffft

1.5.0

updated composer requirements

1.4.3

Merge branch 'develop'