2.1.13

Fixed:
Copy day field when adding a copied book to the library #6
Fixed issue when adding nested groups. Thanks @maforget

2.1.12

New:
Support field templates as args, primarily for conditionals

Fixed:
Out of range error when no custom fields exist
Out of range error when typing a custom field template
Incorrect version in configure form

2.1.11

Added Rating, Community Rating and Custom Values