[IMP] sale_journal: clean and improve the module

addons/sale_journal/__openerp__.py

addons/sale_journal/report/__init__.py

addons/sale_journal/report/picking_journal_report.py

addons/sale_journal/report/picking_journal_report_view.xml

addons/sale_journal/report/sale_journal_report.py

addons/sale_journal/report/sale_journal_report_view.xml

addons/sale_journal/sale_journal.py

addons/sale_journal/sale_journal_view.xml