Changed hardcoded table names to variable ones
Added pagination buttons to invoices shortocde
Added 'duration' field to orbis_subscription_types
Updated shortcode query to scroll thorugh dates
Updated version number and changelog
Updated translation files
Replaced 'duration' with 'interval'
Updated database setup query
Updated translation files.
Added an empty value to the interval drop down.
Fixed query, missing comma.
Getting ready for version 1.1.0.
Merge branch 'release/1.1.0'