Removes unknown values from fill functions.

Indexes will no longer match Ids.
Updated all tests to use char* argv[] instead of char** argv.

sbf-cpp/Backgrounds_test.cpp

@@ -18,7 +18,7 @@ TestResults test_FillBackgroundLabels();
 
 using namespace Test::Backgrounds;
 
-TestResults main_test_Backgrounds(int argc, char** argv) {
+TestResults main_test_Backgrounds(int argc, char* argv[]) {
   TestResults results;
 
   results += test_GetBackgroundLabel();