This allows support for having tawashi in a subdirectory of your domain, eg http://example.com/tawashi
This means if you set uri name to http://example.com in the config file you will actually get base_uri to be http://http://example.com.
With this change I had to swap the order in which what settings file as being loaded and the initialization of the logger itself. This is because the logger now depends on the settings file, so it can't be used before the setting file got parsed.
