fix bug when transfer all wallet
Merge pull request #13 from vigov5/master

fix bug when transfer all wallet
Order special items by price
Send Emails to Shop's staffs when there are new invoices created
Add send shop open notification for shop's staffs
Send emails to shops staff about unaccepted invoices
Redirect to the previous URL after loggin in
Add buy items with HCoin Feature
Allow users to view previos announcements