base: fix static files serving from DocumentRoot
base: fix static files serving from DocumentRoot

* Implements Nginx's "try_files" like functionality using custom wsgi
  middleware for Apache and WSGIScriptAlias for invenio.wsgi together
  with mod_rewrite.

* NOTE regenerate your apache configuration by running
  `inveniomanage apache create-config`.

Signed-off-by: Jiri Kuncar <2bdffcb416fed3002465740d19a053a39918cbe5@cern.ch>
Tested-by: Yoan Blanc <7e8c88beed64bd6a341c3085bc82ac100e832f6e@cern.ch>

tiborsimko/invenio-search,tiborsimko/invenio-search,inveniosoftware/invenio-search,inveniosoftware/invenio-search