Fixes #415. do net call toJSV when result is null
Exceptions in REPL should be separate lines
Merge pull request #417 from filipw/415

Avoid empty lines in REPL
Replaced REPL processing logic with FilePreProcessor. Removed PreProcessorUtil.
Fixed failing tests
Moved point where path is added to loaded collection to prevent load loop
Added empty ScriptResult when result is null
Merged upstream changes
Merged upstream changes