re #92 add new seller services, one to update a seller and one to get a
seller by static id and language id
re #92 add success message in the seller edition page template
re #92 update unit tests with the two new functions in seller service (
get_seller_by_id_language and update_seller )
re #92 update the settings seller view to update the form when submit
re #92 fix errors in seller unit tests
re #92 delete all blank spaces in templates
Merge pull request #116 from jean553/fix_92

Fix 92 - Submit the seller modifications when the submit button on the seller settings is clicked