core: code refactor and cleanups for easier pylons porting.

urls: use pyramid routing for support tracker link.

configs: removed old templates logger

tests: change lib tests to use proper pyramid mocks.

tests: add require methods to testing request. - pluralize - get_partial_renderer

core: cleanup settings cleanups on pyramid app.

tests: small code cleanup

system-info: fix reading backends from config. - now it's already as a list.

partial-renderer: use package resource format for templates. - it's faster then lookup - doesn't require any special configuration changes

tests: re-use config_stub for svn tests