extract meta data on the fly for file base attachments
initial commit for service
add MetaScriptService to components
Merge branch 'dev' into feature_metaDataForFileBaseAtts

Conflicts:
	component/src/main/java/com/celements/photo/service/ImageService.java
fix test to reflect code changes
Merge pull request #4 from celements/feature_metaDataForFileBaseAtts

Feature meta data for file base attachments