make currency specifier explicit rather than using prefix
Add currency conversion methods to formatNumber
remove class binding for currencies
Merge branch 'refs/heads/master' into currency-conversion
Add currency switcher
capitalize h1s
Rename formatNumber to numberWithCurrency

Clashed with built-in formatNumber
Merge branch 'refs/heads/master' into currency-conversion

Conflicts:
	assets/stylesheets/application.scss
Merge pull request #151 from theodi/currency-conversion

Currency conversion