re #81 add a route for the get_seller_languages view
re #81 add JSON representation of Language object
re #81 edit the internationalization script to manage seller languages
selection
re #81 modify the internationalization template to manage seller
languages selection events
re #81 add view who returns the languages of a given seller
re #81 upload the ajax loader image
re #81 delete useless blank spaces
re #81 fix event bug
re #81 modify the get-seller-languages route path
re #81 the internal error message is hidden by default
re #81 update the internationalization script
re #81 add the internal error message in the internationalization
template
Merge pull request #102 from jean553/fix_81B

Fix 81B - Integrate seller language management