Collective-setuphandlertools

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- Depend on ``Products.CMFPlone`` instead of ``Plone`` to not fetch unnecessary dependencies.
[thet]

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- Allow color styles in unsafe_html_transform step. Allows colorizing text in
TinyMCE.
[thet]

- In create_item and create_item_runner, allow configurations of existing
items. Still don't allow creating items over existing ones.
[thet]

- Add options to deactivate hiding or retracting to hide_and_retract, if
necessary.
[thet]

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- Add update_portlet_schema helper function.
[thet]

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- Bugfixes: Missing import and don't call callers_globals for load_file.
[thet]

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- Initial release.
[thet]