Refactored reference shortening utility (added expression references shortening and rewritten to Kotlin)
Minor refactoring in ResolveSessionUtils
Fixed bug in reference shortening
Checking for highlighted parameter in test.
Striking out deprecated functions in parameter info.
KT-4349 Make jet.Boolean implement Comparable

 #KT-4349
Removed unreachable code.
KT-4347 add Array extension indexOf to stdlib