Disentagle the changes and history. First step is to move everything from old releases into the history file, only keeping the latest entries in changes.

Updated to ZODB 3.9.0a10. ZODB-level version support has been removed and ZopeUndo now is part of Zope2.

Put back the defaultSkin directive. I misread the comments and only the other two directives in the misc section where deprecated.

from a meta-equiv header

Updated to newer versions of zope packages. Removed long deprecated defaultSkin, layer and skin ZCML directives.

for making Zope 2.12 run with ZODB 3.9 (having ZopeUndo removed)