RethinkDB native connector work, minor fixes.

ext/librethinkdbxx/test/gen_index_cxx.py

@@ -0,0 +1,11 @@
+from sys import argv
+from re import sub
+
+print("#include \"testlib.h\"");
+print("void run_upstream_tests() {")
+for path in argv[1:]:
+    name = sub('/', '_', path.split('.')[0])
+    print("    extern void %s();" % name)
+    print("    clean_slate();")
+    print("    %s();" % name)
+print("}")