still a lot of things to do

 A lot of code relied on these descriptors being mutable. In most cases I managed to work around this,
 but there're still are casts to raw List necessary in one or two places

In the most places in frontend identifier is stored in Name class, was in String.
Name has two advantages over String:
* validation: you cannot accidentally create identifier with dot, for example
* readability: if you see String, you don't now whether it is
  identifier, fq name, jvm class name or something else

Name's disadvantage is (small) performance overhead. We have no value types in JVM.

It is just prototype

* does not make top level symbols visible as class members yet
* does not take parameters
* Script class name is hardcoded now

#KT-1829 Fixed

MUST_BE_WRAPPED_IN_A_REF was renamed to CAPTURED_IN_CLOSURE (immutable variables are stored there as well)

 #KT-1743 fixed

A value parameter _declares _a default value when the value is explicitly provided in the declaration of the parameter.
A value parameter _has_ a default value when it declares a default value or an overridden function declares it for the same parameter

Refactor cli: all the jvm stuff goes under org.jetbrains.jet.cli.jvm, common stuff under org.jetbrains.jet.cli.common

Refactor cli: all the jvm stuff goes under org.jetbrains.jet.cli.jvm, common stuff under org.jetbrains.jet.cli.common

Self message, cause message and both position in the file under compilation and the executed file position are reported

I need in my private experiments

needed to implement @PreDestroy

move classBuilderMode to injector and GenerationState from ClassBuilder