added post clients class
added delete clients path
added show action to get clients
removed pry from espago.rb
added facets to gem. added put clients path
added clients authorization path
added post charges path
added get charges path
added delete charges path
added charges refund path
added get tokens path
added post tokens path
changed router api
refactored router
added path_exists? method to router
removed active_support from gemspec. Changed Router get_class_name method to use capitalize instead of camelize