add default USD to userFiat
Merge pull request #54 from Fandekasp/feature/fiat_choice

Feature/fiat choice
Remove only an address for 1 coin for 1 user
fix add_address
Hide coin_name
underscore → camelCase
set smarter checkaddress rule with address format
update all implemented coins with address format
fix dogecoin&Earthcoin address format
fix verify_address tests
Merge pull request #56 from Fandekasp/feature/fix_addresses_unique

fix_addresses_unique
integrate Particle
integrate Mastercoin
update settings
update fixtures properly
update beta information message
remove line break
fix github url
PopCoin → Popularcoin
Add new images and remove sprites from gitignore