AD::Routing::Mapper::Mapping.new has a new contract
rails 4.2 discriminates url and path helpers

Therefore, tweaking a little bit the way to add the untranslated helpers
wip
Regenerate parsed_path_info if present

The new Rails 4.2 router needs it as it uses asts to generate transition
tables (whatever that means)
Simpliy logic to find helper names
Always restore old previous i18n config
Add / to dummy mounted app request
Better testing of url helpers
Remove pry-byebug for now
Use 1.8 hash syntax
Remove ruby 1.8 compatibility
Merge pull request #70 from enriclluelles/rails42_compatibility

Rails42 compatibility