Currency filter is missing option to control sign position and dot/comma setting

[telamon]

Hi!
I checked the source for the currency filter and realized that there is no way to specify the position of the
currency sign or specify if delimiters should be dots or commas.

In some locales like Swedish the rules for currency presentation is different e.g.
given 123456789 | currency('kr')
The filter produces:
kr1,234,567.89
But according to Swedish standard the formatting should be:
1 234 567,89 kr

In other words, I'd like to submit a feature-request to be able to control the decimal-separator and the thousand-separator and of course placement of currency-sign.

[freearhey]

Closed due inactivity.

[marcushultman]

Opened pull request #41.