start of tests refactoring; sqlite3 new wrapper fixes

tests/reject/trefs.nim

@@ -0,0 +1,16 @@
+# test for ref types (including refs to procs)
+
+type
+  TProc = proc (a, b: int): int {.stdcall.}
+
+proc foo(c, d: int): int {.stdcall.} =
+  return 0
+
+proc wrongfoo(c, e: int): int {.inline.} =
+  return 0
+
+var p: TProc
+p = foo
+write(stdout, "success!")
+p = wrongfoo  #ERROR_MSG type mismatch
+