[MERGE] merge from cleanning branch : please do not forget to start an update on the module updated. base_external_referential : REFACTOR - redesign the view and for commun fields between various e-commerce the visibility can be set withthe variable REF_VISIBLE_FIELD ex : REF_VISIBLE_FIELDS['Magento'] = ['location', 'apiusername', 'apipass']
FIX - fix copy method on mapping - fix export resource when ids an empty tuple or an empty list - increase the size of the field action on the report line to avoid error - FIX Call the onchange correctly using args and kwargs
ADD - add the type url in the mapping - improve reporting system, avoid the creation of unlimited error message on some object - add the posibility to send an email when an error occure
file_exchange / base_file_protocol: ADD - add support of xls
base_external_file_protocole REFACTOR - improve file.buffer (need for amazon)
report_syncronizer REFACTOR - refactor the export of file (needed for exporting OpenERP PDf into magento)