#7 refactoring using before_action to find  @project
#7 refactoring isassignee?
#7 authentication checking has been changed (using before_action for each controllers) + link project#members
#7 refactoring code; params[:id]==nil should be deleted!
#7 refactoring code;find_project includes authentication
#7 refactoring routes
#7 refactoring final
Merge branch 'master' of https://github.com/DonutWorks/ToDo.nut into feat/project-authentication-7

Conflicts:
	app/assets/javascripts/histories.js
	app/controllers/histories_controller.rb
	app/controllers/projects_controller.rb
	app/controllers/todos_controller.rb
	app/helpers/histories_helper.rb
	config/routes.rb
Merge pull request #56 from DonutWorks/feat/project-authentication-7

Feat/project authentication #7