Use forceDomain redirect only for 'production' environment.
Added a page where user can view all list of own exercises
Restre lost texts
Exercises configuration page's interface prepared for update functionality.
Getting rid of translationHelper. Exercises configuration interface updated.
Sorting of exerecise list moved to client side.
Interface for add and edit exercises was updated.
Save new and modified exercises in data storage.
Merge pull request #6 from andrei-golyakov/config-exercises

Exercises configuration page added.