[#92] Create form to add and edit contests.
- Create show, edit, new views with controller actions.
- Add create, update and destroy actions in the controller.
- Fix pl translation of invalid date msg. Add div container to body.
- Fix club name, removed dots.
Merge pull request #47 from gotar/92-create-contests-form

[#92] Create form to add and edit contests with corresponding views and actions.