major feature: Around 1400 bug fixes. Performance enhancements, especially to compilation times in the IDE. Even smoother interoperation with Java overloading and Java generics. Out of the box support for deployment of Ceylon modules on OSGi containers. Enhancements to the Ceylon SDK, including the new platform modules ceylon.promise, ceylon.locale, and ceylon.logging, along with many improvements to ceylon.language, ceylon.collection, and ceylon.test. Many new features and improvements in Ceylon IDE, including ceylon.formatter, a high-quality code formatter written in Ceylon. Support for command line tool plugins, including the new ceylon format and ceylon build plugins, and integration with vert.x.