Merge pull request #142 from umpirsky/feature/serbian-cyrillic

Serbian cyrillic translation
fix sidebar id
Merge pull request #145 from Antek88/feature/fix_view

small fix view
Configurable default extension
Added exchange rates
Using sylius_price filter in front
CurrencyContext, currency stored in session/user
Switch currency
Added currency to order
Currency context can get default currency
CS
Fixed tests
Update money bundle