JS backend: add option 'output library runtime fiies' for Kotlin Compiler
K2JS: get rid of MetaInfServices
fix kotlin-js-library maven project
JS backend: maven: fix compiler mojo
JS maven tests: fixes configuration files
add kotlin-js-library-example maven project
add browser-example-with-library maven project (kotlin->javascript)
add KotlinJavascriptMavenConfigurator