Add empty controller DetentionSlip
add Html::Option helper
add default detention slip config form view
implement parsing of config file

+ default config
use php serialization instead of ini
fixed some style
fix return value of Tools::GetLastError
add some style
handle config submit + add auto_close class

moved the jquery inclusion in the base template
extract config file path
implement previewAction
remove unused file
extrat pdf generation in a template
extract slip parameters
added removed image type spec in pdf
implement printg-ing
fix: add missing function
use logo file in local folder
remove unsupported image types
reject png with alpha channel