Feature: Make client_max_body_size configurable
Feature: Allow internal apis to have customizable max body size as well
Feature: Enable local conf for internal apis
Feature: Add optional app-specific configuration of node attrs
Add node helper to template helper as well

Had to use node as first param, since self.node is not available in helper and ::EasyBib::Config
Adapt nginx-app to new helper module
Merge pull request #533 from fh/t/post-size

Feature: Make client_max_body_size configurable