scroll down al añadir productos.
Merge pull request #78 from suyccom/errors_151_solo_dos_lineas_scroll_down_anadir_productos

 errors_151_solo_dos_lineas_scroll_down_anadir_productos
permitir generar descuento desde la pantalla de venta
Merge pull request #79 from suyccom/generar_vale_desde_venta

permitir generar descuento desde la pantalla de venta
Fix syntax error
Avoid enter key press on certain inputs when new sale
Some little CSS fix for webkit on new sale (search inputs and placeholders)
Avoid user to set blank on discounts' inputs (new sale)
Some translations
Phussion Passenger new feature
Reorder Gemfile
Support to ignore .ruby-version
Hide Payment methods when no line in on Sale
Some style for Voucher links and messages
Fix conflict