KotlinJvmBinaryClass now has its own visitor interfaces, which are an
abstraction over ASM visitors and the ones that will be implemented over
reflection
Cleanup module dependencies: a lot of modules depended on 'frontend.java' just
to use something from 'util' module, exported by 'frontend.java', whereas they
really need nothing from 'frontend.java'. Also 'frontend.java' just exported
'util', not using anything from it.
Create a new 'util.runtime' module, which will be available at runtime. Make
'util' export 'util.runtime' and make all modules who needed these utils depend
on 'util' directly instead of 'frontend.java'
Make 'Callable' message of descriptors.proto extensible, extend it in
java_descriptors.proto with a JVM signature of the member. This is needed in
order for annotation deserializer to find out which member in the compiled
bytecode corresponds to which descriptor in the hierarchy.
Create a new module 'serialization.java' containing everything related to
Java-specific serialization of descriptors.
Add an extension point to DescriptorSerializer, allowing to perform
platform-specific serialization on a callable