Updates to the ConfigBlock

Fixes:
 - adding missing API
 - adding ConfigDict -> ConfigBlock alias
 - Fixing the update of default values when basing one ConfigBlock on another.

pyutilib/misc/config.py

@@ -173,7 +173,7 @@ def __setstate__(self, state):
 
     def __call__(self, value=NoArgument):
         ans = self.__class__()
-        ans._default     = self._default
+        ans._default     = self.value()
         ans._domain      = self._domain
         ans._description = self._description
         ans._doc         = self._doc
@@ -209,6 +209,13 @@ def name(self, fully_qualified=False):
         else:
             return self._name
 
+    def set_default_value(self, default):
+        self._default = default
+
+    def set_domain(self, domain):
+        self._domain = domain
+        self.set_value(self.value(accessValue=False))
+
     def _cast(self, value):
         if value is None:
             return value
@@ -959,6 +966,10 @@ def _data_collector(self, level, prefix, visibility=None, docMode=False):
                                                      visibility, docMode):
                 yield v
 
+# Future-proofing: We will be renaming the ConfigBlock to ConfigDict in
+# the future
+ConfigDict = ConfigBlock
+
 # In Python3, the items(), etc methods of dict-like things return
 # generator-like objects.
 if six.PY3: