revert series if last id is deleted
[feature] drag / drop attachments fixes frappe/erpnext#2098. also fixed boo boo in revert naming series
removed allow_attach (useless) and added validation for drag and drop
[cleanup] remove allow_attach
[fix] allow_attach
[fix] removed title left
[css] sidebar
[style] default website
Merge pull request #791 from rmehta/aug-22

Revert series on delete / drag drop attachments
[fix] patches related to the deprecated Website Route
[fix] [hot] removed print
[hot] [fix] web_page.py
[hotfix] sidebar.html
[website] fix add sidebar
Merge pull request #793 from rmehta/aug-25

[website] fix add sidebar
[hotfix] removed print
[hotfix] sidebar
Append X-Frappe-Site header in outgoing email
Merge pull request #796 from anandpdoshi/anand-august-27

Append X-Frappe-Site header in outgoing email
[fix] Handle clear notifications deadlock