removed a warning more cleanup, added ENTITY and ENTITIES support

* tree.c: removed a warning
* xmlschemastypes.c: more cleanup, added ENTITY and ENTITIES
  support
* check-relaxng-test-suite.py check-xsddata-test-suite.py:
  cleanup/improvements of the regression tests batch
* test/relaxng/testsuite.xml: augmented libxml2 own testsuite
Daniel
diff --git a/check-relaxng-test-suite.py b/check-relaxng-test-suite.py
index 6f65264..2e378f4 100755
--- a/check-relaxng-test-suite.py
+++ b/check-relaxng-test-suite.py
@@ -10,6 +10,7 @@
 # Memory debug specific
 libxml2.debugMemory(1)
 debug = 0
+verbose = 0
 
 #
 # the testsuite description
@@ -336,7 +337,7 @@
         handle_testSuite(test, level + 1)
 	        
 
-    if level >= 1 and sections != []:
+    if verbose and level >= 1 and sections != []:
         msg = ""
         for section in sections:
 	    msg = msg + section.content + " "