Grokcore.component

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* Add missing provider, global_adapter, implementsOnly, classProvides() to
the module interface so that they are included in __all__

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* Add convenience imports for implementsOnly() and classProvides() class
declarations form zope.interface.

* Add support for registering global adapters at module level::

grok.global_adapter(factory, (IAdapted1, IAdapted2,), IProvided, name=u"name")

Only 'factory' is required. If only a single interface is adapted, the
second argument may be a single interface instead of a tuple. If the
component has declared adapted/provided interfaces, the second and third
arguments may be omitted.

* Add support for an provider decorator to let a function directly provide
an interface::

grok.provider(IFoo, IBar)
def some_function():
...

This is equivalent to doing alsoProvides(some_function, IFoo, IBar).

* Add support for named adapters with the adapter decorator::

grok.adapter(IAdaptedOne, IAdaptedTwo, name=u"foo")
def some_function(one, two):
...

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* The ``IGrokcoreComponentAPI`` interface was missing declarations for
the ``title`` and ``description`` directives.

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* Fix https://bugs.launchpad.net/grok/+bug/242353: grokcore.component
contains old-style test setup. There is no `register_all_tests`
method in grokcore.component.testing anymore. Use z3c.testsetup
instead.

* Allow functions that have been marked with grok.subscribe also be
registered with ``zope.component.provideHandler()`` manually. This
is useful for unit tests where you may not want to grok a whole
module.

* Document grokcore.component's public API in an interface,
``IGrokcoreComponentAPI``. When you now do::

from grokcore.component import *

only the items documented in that interface will be imported into
your local namespace.

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* Ported class grokkers to make use of further improvements in Martian.
This requires Martian 0.10.

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* Ported class grokkers to make use of the new declarative way of
retrieving directive information from a class. This requires
Martian 0.9.6.