Plone.app.theming

------------------

- Add setting for tinymce automatically detected styles
[vangheem]

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- fix AttributeError: 'NoneType' object has no attribute 'getroottree' when the result is not
html / is empty.
[sunew]

- make control panel usable again. Fixed problem where skins
control panel is no longer present.
[vangheem]

- unified different getTheme functions.
[jensens]

- pep8ified, housekeeping, cleanup
[jensens]

- Specify i18n:domain in controlpanel.pt.
[vincentfretin]

- pat-modal pattern has been renamed to pat-plone-modal
[jcbrand]

- Fix load pluginSettings for the enabled theme before calling plugins for
onEnabled and call onEnabled plugins with correct parameters
[datakurre]

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- Patch the ZMI only for available ZMI pages.
[thet]

- Change deprecated import of ``zope.site.hooks.getSite`` to
``zope.component.hooks.getSite``.
[thet]

- Add an error log if the subrequest failed (probably a relative xi:include)
instead of silently returning None (and so having a xi:include returning
nothing).
[vincentfretin]

- Fix transform to not affect the result when theming is disabled
[datakurre]

- Integrate thememapper mockup pattern and fix theming control panel
to be more usable
[ebrehault]

------------------

- Remove DL's from portal message in templates.
https://github.com/plone/Products.CMFPlone/issues/153
[khink]

- Fix "Insufficient Privileges" for "Site Administrators" on the control panel.
[rpatterson]

- Add IThemeAppliedEvent
[vangheem]

- Put themes in a separate zcml file to be able to exclude them
[laulaz]

- 14107 bot requests like /widget/oauth_login/info.txt causes
problems finding correct context with plone.app.theming
[anthonygerrard]

- Added support for ++theme++ to traverse to the contents of the
current activated theme.
[bosim]

------------------

- Disable theming for manage_shutdown view.
[davisagli]

- Fix reference to theme error template
[afrepues]

- Add "Test Styles" button in control panel to expose, test_rendering template.
[runyaga]

------------------

- Fixed i18n issues.
[thomasdesvenain]

- Fixed i18n issues.
[jianaijun]

- This fixed UnicodeDecodeError when Theme Title is Non-ASCII
in the manifest.cfg file.
[jianaijun]