Pluralization support

[Xowap]

There is a cruel need for pluralization support in the translations system. Proposed syntax for keys:

SOME_STUFF[n=1],I have one carrot
SOME_STUFF[10<=n<=20], I have between 10 and 20 carrots
SOME_STUFF[n>20],I have more than 20 carrots
SOME_STUFF,I have {n} carrots

A typical case in French:

"SOME_STUFF[0,1]",J'ai {n} carotte
"SOME_STUFF",J'ai {n} carottes

So basically, the part between brackets allows to specify a boolean condition (exact syntax to be determined). The line without brackets is the default one (usually the plural one)