Fix a slip in the MCPackage>snapshot override.  PackageInfo methods answers an
array of MethodReferences, not CompiledMethods.
merge
Fix an issue with parsing XML where a nested close tag was not completed properly.

For example the tokenizer never made progress on this:
<x>
  <z>
    <w>
      <y> f </y
    </w>
  </z>
</x>
Merged
Added #message method to SyntaxErrorNotification
Merged
Merged
Added tag G66.1 for changeset 25a2f312267c
Added tag G67 for changeset 42f97c6aefd9
Merged
Add class frmat calculation for the Spur format.
Add Files-eliot.119.mcz: Speed up fullNamesOfAllFilesInSubtree by eliminating
dual enumeration over entries.
optimize the parsing by not allocating a empty dictionary of 33 elements each time a tag is parsed.
remember the line number when parsing xml nodes.
Merge
Start populating a separate namespace for Newspeak resources. Remove various multi-language code.