vcs: Move VCSMiddleware up to pyramid layer as wrapper around pylons app. The VCSMiddleware is now moved to the pyramid layer and acts as a fallback if pyramid does not find a view to handle the request.

config: Move initial repo scan up to the pyramid layer. It is now subscribed to the ApplicationCreated event from pyramid.

vcs: Retrieve base path and realm with new helper methods.

js-log: logger doesn't have warning(), just warn().

static: use static_path instead of static_url to account for http vs https

celery: create custom celery task class which loads context/threadlocals of the original request required for tasks like create_repo which needs to generate a url after the repo is created. fixes #4139

jsonalchemy: add pickle support to mutation dict so that json setting values can be pickled and passed to celery tasks

svn: Add rhodecode realm to subversion configuration generation.

svn: Set authentication realm to None in apache config template Inside of the vcs middlewares we are using the empty string as authentication realm for HTTP basic auth. Because we are proxy the requestst between svn client and mod_dav_svn wen have to use the same authentication relam in mod_dav_svn and vcs middleware. Otherwise auth is impossible because of mismatching realms.

svn: Adapt tests to recent changes in implementation.