Reverted test file.
A workaround for exception caused by a jar with the same content occurring twice on the classpath
Make exceptions from compiler reported as is, without any wrappers visible in EA
Update icons
Add ability to filter import usages
Refactoring: extract common code to method.
Check errors and are all actions are expected in quick fixes tests
KT-3157 Java void method are inserted with ; after completion

 #KT-3157 Fixed
Report environment errors through messageCollector when available
Java compiler error reporting fixed
Changing default nullability for type arguments to NotNull
TypeUsage moved out of JavaTypeTransformer
Nullability propagation with NotNull as default for type arguments
Fix for varargs vs arrays of boxed types
Tests fixed after default nullability for type arguments changed to NotNull
KDoc compilation fixed
maven: report Kotlin Compiler version as INFO
update_dependencies.xml: cache downloaded artifacts. do not use search.maven.org!
do website generation in pre-package step
pack website with assembly plugin