Generate Bilingual Certificates

[wesamhamad]

Certificate should have two languages side by side. Each with intro of certificate, name of recipient, body of certificate and final greeting.

• [x] Generate English Certificates
• [x] Generate Bilingual Certificates
• [x] Add Default Positions to fit two languages side by side
• [x] Allow user to modify x and y positions in edit template page to customize template and certificate items in bilingual