Added some currencies and a new display format

Currently it’s not possible to display the Swiss currency with its
correct formatting which is: 23’432 CHF. I added a new display format
“9’999.99” and included the Swiss currency and some more currencies
that I need or I think others might need.
Fixed "euro" key

Accidently changed the Euro-key from “euro” to “eur” with the last
commit.
pods_v optimization to currency.php and a few other tweaks
Merge pull request #2066 from mojomonk/2.x

Added some currencies and a new display format