Grokcore-component

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- Nothing changed yet.

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- Replace the use of `grok.implements()` with the `grok.implementer()`
directive throughout.

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- Rearrange tests such that Travis CI can pick up all functional tests too.

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- Add support for Python 3.5, 3.6, PyPy2 and PyPy3.

- Drop support for Python 2.6 and 3.3.

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- Add ability to exclude more than one module or package using
``<grok:grok exclude="<names>" />`` and allow to use unix shell-style
wildcards within.

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- Make grokcore.component.implementer compatible with
zope.interface.implementer by allowing doing the adapter magic when
used on functions.