adding basic GM magic lib
Merge branch 'develop' into feature/image_compression
adding thumbnail table
refactoring of helper classes
refactoring image name to image id
adding save img method (to create thumbnails)
reverse rename name to id (image)
removed image token
refactoring get image method
adding dynamic creation of thumbnails
fixed resizing (only scale down)
prepair for unified image save method
adding deletion of unused thumbnails (when deleting images)
Merge branch 'feature/image_compression' into develop