Postwizard, ContactBox, Postcreation, Load path, WpContent

* Blank postwizard
* ContactBox; new contact items (hidden, attachment)
* ContactBox; contact items now have a configurable ID
* Postcreation now is more configurable; poststatus can be specified
* Loadpath constant is now defined by nxsfunctions so it can be re-used
* WpContent; blank site style option is removed
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