complete, checking on other platforms is needed updated fix a bug raised

* runtest.c: complete, checking on other platforms is needed
* README: updated
* debugXML.c: fix a bug raised by bill on IRC
* relaxng.c: fix a leak in weird circumstances
* runsuite.c Makefile.am: standalone test tool agaisnt
  the regression suites, work in progress
Daniel
diff --git a/README b/README
index 279b375..7726225 100644
--- a/README
+++ b/README
@@ -6,6 +6,21 @@
 
 This code is released under the MIT Licence see the Copyright file.
 
+To build on an Unixised setup:
+   ./configure ; make ; make install
+To build on Windows:
+   see instructions on win32/Readme.txt
+
+To assert build quality:
+   on an Unixised setup:
+      run make tests
+   otherwise:
+       There is 2 standalone tools runtest.c and testapi.c, which should
+       compile as part of the build or as any application would.
+       Launch them from this directory to get results, runtest checks 
+       the proper functionning of libxml2 main APIs while testapi does
+       a full coverage check. Report failures to the list.
+
 To report bugs, follow the instructions at: 
   http://xmlsoft.org/bugs.html