Some enhancements/bug fixes for Windows

* Enabled pipe: on outputs
* Don't die on file paths containing backslashes in DRC tests

src/drc/unit_tests/drcBasicTests.cc

@@ -36,8 +36,8 @@ TEST(1)
 
   lym::Macro drc;
   drc.set_text (tl::sprintf (
-      "source(\"%s\", \"TOP\")\n"
-      "target(\"%s\", \"TOP\")\n"
+      "source('%s', \"TOP\")\n"
+      "target('%s', \"TOP\")\n"
       "l1 = input(1, 0)\n"
       "l1t = labels(1, 0)\n"
       "l2 = input(2, 0)\n"

src/drc/unit_tests/drcSimpleTests.cc

@@ -40,7 +40,7 @@ TEST(1)
     lym::Macro config;
     config.set_text (tl::sprintf (
         "$drc_test_source = nil\n"
-        "$drc_test_target = \"%s\"\n"
+        "$drc_test_target = '%s'\n"
       , output)
     );
     config.set_interpreter (lym::Macro::Ruby);
@@ -79,8 +79,8 @@ TEST(2)
     //  Set some variables
     lym::Macro config;
     config.set_text (tl::sprintf (
-        "$drc_test_source = \"%s\"\n"
-        "$drc_test_target = \"%s\"\n"
+        "$drc_test_source = '%s'\n"
+        "$drc_test_target = '%s'\n"
       , input, output)
     );
     config.set_interpreter (lym::Macro::Ruby);
@@ -119,8 +119,8 @@ TEST(3)
     //  Set some variables
     lym::Macro config;
     config.set_text (tl::sprintf (
-        "$drc_test_source = \"%s\"\n"
-        "$drc_test_target = \"%s\"\n"
+        "$drc_test_source = '%s'\n"
+        "$drc_test_target = '%s'\n"
       , input, output)
     );
     config.set_interpreter (lym::Macro::Ruby);

src/drc/unit_tests/drcSuiteTests.cc

@@ -44,8 +44,8 @@ void runtest (tl::TestBase *_this, int mode)
     //  Set some variables
     lym::Macro config;
     config.set_text (tl::sprintf (
-        "$drc_test_source = \"%s\"\n"
-        "$drc_test_target = \"%s\"\n"
+        "$drc_test_source = '%s'\n"
+        "$drc_test_target = '%s'\n"
         "$drc_test_mode = %d\n"
       , input, output, mode)
     );

src/tl/tl/tlStream.cc

@@ -645,10 +645,8 @@ OutputStream::OutputStream (const std::string &abstract_path, OutputStreamMode o
   tl::Extractor ex (abstract_path.c_str ());
   if (ex.test ("http:") || ex.test ("https:")) {
     throw tl::Exception (tl::to_string (tr ("Cannot write to http:, https: or pipe: URL's")));
-#ifndef _WIN32 // not available on Windows
   } else if (ex.test ("pipe:")) {
     mp_delegate = new OutputPipe (ex.get ());
-#endif
   } else if (ex.test ("file:")) {
     mp_delegate = create_file_stream (ex.get (), om);
   } else {