CODE: remove inputfiles global init when variable is called only once
Initial commit , first translation to FR , draft

All the string translated to french by a non expert translator, some terms might sounds weird ; would need second review.
FIX: Thumbnail resize to fill preview area
i8n FR: Thanks to David Revoy we now have french translation
Added credits information to the README file
Merge branch 'master' into dev
Version bump 2.2 alpha
FIX: Error if sizes_set(default) not set with presets file present
Small code fixes in svg parsing
Fix xcf thumbnail error if no thumbnail found.