Ftw-events

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- Add option allowing to hide the event listing block if there are no
events to be shown. [mbaechtold]

- Show inactive events if the user has the permission to add
events. [mbaechtold]

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- Move the global ics export documentaction.
[Kevin Bieri]

- Make Event and EventFolder linkable in TinyMCE
[raphael-s]

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- Convert "filter_by_path" references of the event listing blocks.
This should have been done in 1.2.0.
[mbaechtold]

- Show text of "ICS Export" action again.
[Kevin Bieri]

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- Use a text field for the value of the zip code instead of an integer
field. [mbaechtold]

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- Fix chameleon support for mopage export. [jone]

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- Use ftw.referencewidget for saving path relations in eventlistingblocks.
Beacuse of a bug in MultiContentTreeFieldWidget, references were not saved
after a restart of the instance which lead to the blocks not working anymore.
[raphael-s]

- Implement mopage support. [jone]

- Split up location into structured fields title, street, ZIP and city. [jone]