KT-1151 Code completion for not imported extension functions - more tests for extension functions and properties

KT-1151 Code completion for not imported extension functions - test for completion extension function without params

KT-1151 Code completion for not imported extension functions - completion for extension functions when function doesn't have parameters

Fix JsAstUtil using wrong Nullable annotation.

 #KT-1459 fixed

 #KT-1443 fixed

Analyzer -> Analyzer Facade
Refactor for translators.
Fix a bug with scopes.

* do not fail on errors
* do not analyze function bodies
* generate "throw new RuntimeException()" in bytecode

moved the useful test methods into the kotlin-test jar so its easy to reuse on other modules/projects

Move TestConfig to js.tests module. Remove K2JSTranslationUtils. Remove core.Dummy class. TestConfig references library files using project file structure instead of getResourceAsStream.

added a demonstration of how Kotlin currently handles nullable collections on for loops - by throwing NPEs