Grokcore.security

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* Changed the default permissions from grok.View to zope.View. There seems no
particular reason not to use the standard zope.View permission defined
in zope.app.security.

NOTE: YOU MUST STILL ASSIGN THIS PERMISSION TO USERS IN YOUR
site.zcml FILE. OTHERWISE YOU DO NOT HAVE ACCESS TO ANY VIEWS.

* Made sure to include zope.app.security configuration as well, as that
package defines the zope.View permission. Note that in the future this will
change to zope.security.

* Bring versions.cfg in line with grok 1.0 release candidate
versions.cfg.

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* Changed the default permissions from zope.Public to grok.View.

NOTE: YOU MUST ASSIGN THIS PERMISSION TO USERS IN YOUR
site.zcml FILE. OTHERWISE YOU DO NOT HAVE ACCESS TO ANY VIEWS.

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* Created ``grokcore.security`` in July 2008 by factoring
security-related components, grokkers and directives out of Grok.