[WIP] Using local modwsgi egg

Marked WIP because of ongoing deploy.

When different users deploy/build the project in the same directory (e.g. /var/www.), we always had this strange right error on modwsgi file(s) on first try. The second try worked.

It was caused because the egg tried to set some rights that weren't necessary. I corrected that in the egg and added the egg locally, which is now used instead.

What was changed in the egg? 
https://github.com/wichert/collective.recipe.modwsgi/blob/master/collective/recipe/modwsgi/__init__.py#L100 and the followin line were taken out.