Thanks to using own python with own libraries, there will be library version
conflicts, as lxml is built against own libz.

It is required to override-update command as section is being update.

As slapos.cookbook provides different modules it is required to correctly
select when egg is wanted and when its module selected.

This is workaround for SlapOS limitation of development environment.

No warnings, the page looks quite readable.

Mostly formatting changes and few obvious mistakes.

Initialise once with slapos.recipebox.
Do not use extras, as not required.