Kotlin M6.2

What's new:

• Language features
  • Tail-call optimization with [tailRecursive]
  • Constant expression evaluation
  • Suffixes for Longs and Floats: 1L and 1.0F
• Compilation to JavaScript
  • Default arguments
  • Super-constructor calls
  • Class-objects in traits
• Java Inteoperability
  • @ReadOnly and @Mutable for collections
• Android
  • Better annotations for Android SDK
• IDE
  • Support for IntelliJ IDEA 13
  • Find Usages
  • Compiler preferences
  • Smart completion (Ctrl+Shift+Space)
  • Rename from Java
  • IDE warns on misusing Kotlin APIs from Java
• Ant
  • Integration with <javac>
  • Support for compilation to JavaScript