Fixes in maintenance schedule
Item website specification from item group
Make debit/credit note from sales/purchase return
Pricing rule condition if item group missing
Fixed requirements.txt
Fixed get_sender for Sales and Jobs
Merge pull request #1866 from anandpdoshi/anand-wip

Fixed get_sender for Sales and Jobs
Merge pull request #1867 from nabinhait/v4-hotfix

Multiple fixes
Improved test_rename: check if comments are also moved on rename
Fix comments after naming series records rename
Minor fix in authorization rule
Fixed customer test
Merge pull request #1869 from nabinhait/v4-hotfix

Minor fix in authorization rule
Merge pull request #1868 from anandpdoshi/anand-wip

Fix comments
Update journal_voucher.py
fix travis, build website before tests
fix status_updater - update delivery status in Sales Order from Sales Invoice