DSL on a module

[petrachi]

Today, DSL doesn't work completely with module.
Because we define many singleton methods, that aren't inherited when module is included.

In order to clean that, we should define a specific module in wich we inject all class methods we need. Then, we extend this module in the "domain".

If the "domain" is a Module, we extend the same module in every class that include the module ObjectSpace.each_object(Class).select{|x| x <=> domain }, and override the 'included/prepended' to add the module to extend.