Kotlin M13 发布，此版本更新内容如下：
Compiler daemon for faster compilation;
lateinit properties to support dependency injection and other frameworks;
sealed classes for expressing closed hierarchies;
Specifying and checking annotation targets;
Java get/set pairs are now seen as properties in Kotlin;
Better type safety for Java interop: taking @NotNull annotations into account (see this blog post);
Modifiers and annotations have been separated syntactically (see this blog post);
Fully functional reflection on classes, functions and properties;
Access to internal is now checked outside of a module (details below);
New .class file layout for top-level functions and properties;
and more (see below)
同时发布了 Kotlin Eclipse Plugin 0.3.0，此版本新特性：
Kotlin M13 支持
查找手册
参数提示
选择 enclosing/next/previous 元素
Override/Implement action
Body conversion intention
Debugger: Run to cursor
Debugger: Step into selection
性能提升
Kotlin 是一个基于 JVM 的新的编程语言，由 JetBrains 开发。
其主要设计目标：
创建一种兼容Java的语言
让它比Java更安全，能够静态检测常见的陷阱。如：引用空指针
让它比Java更简洁，通过支持variable type inference，higher-order functions (closures)，extension functions，mixins and first-class delegation等实现。
让它比最成熟的竞争对手Scala语言更加简单。
软件详情：http://blog.jetbrains.com/kotlin/2015/09/kotlin-m13-is-out/#more-2502
下载地址：http://kotlinlang.org/#get-kotlin
来自:开源中国社区
