[Catalan] Decimal separator and decimal part issues

[francesc-rambla]

I have found some issues in the Catalan translation of numbers with a decimal part.

Check the following code:

# 42.15 in Catalan should be "quaranta-dos coma quinze"
# The following code outputs "quaranta-dos punt un cinc"
print(num2words(42.15, lang='ca'))

In first place, decimal separator in Catalan is a colon not a dot. That's why it should be translated into "coma" (Catalan world for colon) instead of "punt" (Catalan word for dot).

Secondly, the decimal part should be expressed as an integer number prefixed by so many zeros as found in the left side of the decimal part. So, let's see some examples:

Number	Expected output	Code	Current output
12.5	dotze coma cinc	print(num2words(12.5, lang='ca'))	dotze punt cinc
12.15	dotze coma quinze	print(num2words(12.15, lang='ca'))	dotze punt un cinc
12.05	dotze coma zero cinc	print(num2words(12.05, lang='ca'))	dotze punt zero cinc
12.0015	dotze coma zero zero quinze	print(num2words(12.0015, lang='ca'))	dotze punt zero zero un cinc