Kotlin perspective added to Eclipse plugin.

 #KT-5355 Fixed
Package and units validation fixed.
Check if unit exists by OS methods, not by eclipse resources.
Merge pull request #49 from JetBrains/fix_compilation

Update to Kotlin 0.8.232
Merge pull request #47 from adkozlov/elements-wizards

Kotlin perspective added to Eclipse plugin.
Change wizards and perspective icons
New Kotlin project wizard created.

 #KT-5377 Fixed
Classpath file generation added.
Add 120 lines limit and indent for empty lines
Add runtime to Kotlin test project