adding support for most of the methods receiving sample or path as parameter

streamjs/README.md

@@ -4,19 +4,6 @@ Unsupported StreamJS function / method signatures:
  * Stream(collection) 
  * Stream(string) 
  * Stream.empty() 
- * filter(sample) 
  * map(path) 
  * flatMap(path)
- * sorted(path) 
- * takeWhile(sample)
- * dropWhile(sample)
- * min(path) 
- * max(path) 
- * sum(path)
- * average(path)
- * allMatch(sample)
- * anyMatch(sample)
- * groupingBy(path)
- * toMap(path, mergeFunction)
- * partitioningBy(sample);
  * Optional.empty()