Fixed error message

Update readme: prepare for release

Merge pull request #30 from Chiliec/release/4.0.0

Release 4.0.0

Remove shorthand ternary operator for compatibility with older PHP ve…

…rsions, resolves #23

Release 3.0

Merge pull request #16 from yurkinx/master

Fixes duplicating rendered js code multiple times

fix for support any PK name in behavior

Merge pull request #9 from n1k88/master

add german translation

Fix check allow_guests and small refactoring

aggregate_rating cache improve #1