Creating and viewing rankings

Add: partial form for ranking
Add: Rankings index
Add: Ranking view
Add: Creating new ranking
Add: Ranking#entries method (entries sorted by score)
Quotes fix
Creating new tournament
multi_json and polyglot update
Adding players to tournament
Adding t. players fixed + removing t. players.
Rubocop AutoCorrect
Correction with RuboCop
Navigation links
Various tournaments types
Minor css upgrades
Using I18n
Ranking type selection
Rubocop correction
Eliminations scope for Tournament class