Lovely.recipe.cappuccino

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- narwhal-jsc can also be activated from environment variable
"buildoutnarwhaljsc"

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- added "narwhal-jsc" option to explicitely activate narwhal-jsc on MAC
This was needed because of compile problems on some systems.

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- required packages from the buildout configuration are installed with a
separate call to tust install

- required packages from the buildout configuration are installed last

- changed the order of how packages are installed

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- fixed an issue when providing the narwhal user in buildout

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- fixed the narwhal-required option

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- first offical release