Implemented printing from Streams

This is better because you don't need to allocate ALL the benchmarks
before benchmarking them!

core/src/main/kotlin/se/lth/cs/SyntheticBenchmarkDataPrinter.kt

@@ -30,6 +30,10 @@ abstract class SyntheticBenchmarkDataPrinter(out : Writer,
     }
 
     open fun printToCSV(syntheticBenchmarks: List<BCBenchmarkPackage<*>>) {
+        printStreamToCSV(syntheticBenchmarks.stream())
+    }
+
+    open fun printStreamToCSV(syntheticBenchmarks: Stream<BCBenchmarkPackage<*>>) {
         printHeader();
 
         for (syntheticBenchmark in syntheticBenchmarks) {

core/src/main/kotlin/se/lth/cs/commandline/PapiCommandLine.kt

@@ -112,7 +112,7 @@ class PapiCommandLine : CliktCommand() {
             else -> null
         }
 
-        printer!!.printToCSV(benchmarks!!.collect(Collectors.toList()))
+        printer!!.printStreamToCSV(benchmarks!!)
 
     }