Decimal is culture specific

```
Parse.Decimal parses numbers with fractions where the decimal separator is a 
".". 

This should be replaced with 
System.Globalization.CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSepara
tor. 
```

Original issue reported on code.google.com by `brunobra...@gmail.com` on 28 Dec 2012 at 4:34
