Windows WML tests: Improve stdout output

Differentiate between timeouts and real errors: In case of a timeout, only
throw a warning instead of an error.

Also implement a basic progress bar.

projectfiles/VC9/WML_tests.cmd

@@ -9,6 +9,7 @@ set binary=wesnoth.exe
 set opt=--log-strict=warning
 
 cd ..\..\
+echo running WML tests:
 
 :: ignore lines beginning with #
 :: %%G contains whether the test should pass (0), timeout (2) or fail (1,4)
@@ -17,9 +18,19 @@ for /f "eol=# tokens=1,2 delims= " %%G in (%LoadFile%) do (
     :: WindowsTimeout is more reliable than the --timeout option
     WindowsTimeout.exe "%binary% %opt% -u %%H" 20000
     if !ERRORLEVEL! neq %%G (
-        echo WML_tests.cmd: Error WML1: Test '%%H' returned !ERRORLEVEL!, expected %%G
+        if !ERRORLEVEL! equ 2 (
+            echo(
+            echo WML_tests.cmd: Warning WML2: Test '%%H' timed out, expected return value %%G
+        ) else (
+            echo(
+            echo WML_tests.cmd: Error WML1: Test '%%H' returned !ERRORLEVEL!, expected %%G
+        )
     )
+    :: minimalistic progress bar
+    <nul (set/p progress=.)
 )
+echo(
+echo WML tests completed
 
 :: restore the state before execution
 cd %~p0