Add default configuration file

Nothing to see there, just to demonstrate how routing works.
Remove obsolete code in index
Get path of configuration file from a route param
Fall back to a default conf file if needed
Make main template really configurable again
Add main route as a constant
Use MAIN_ROUTE to define / route
Make configurator more robust

When an array of services of a plugin is undefined, return an empty
array when getServices() is called.
Make def conf really minimal
Ok, don't declare a variable as undefined

Wanted to be super expressive with it - jshint doesn't likt it.
Add second param conf for shortcuts to conf files
Merge pull request #55 from latin-language-toolkit/conf_tweaks

Conf tweaks