[Patch] Reimplement (and split) istream::ignore

[Paolo Carlini]

Benjamin Kosnik wrote:

>This looks fine Paolo with this one bit:
>
>>        *  NB: Conformingly, we provide three overloads, instead of the single
>>+        *  function (with defaults) mandated by the Standard: this leads to a
>>+        *  better performing implementation.
>>    
>>
>Should be: 
>
>>+        *  NB: Provide three overloads, instead of the single
>>+        *  function (with defaults) mandated by the Standard: this leads to a
>>+        *  better performing implementation, while still conforming to the standard.
>>    
>>
Yes, thanks for this correction to my (often poor) english: indeed, that 
sentence didn't "sound"
quite right...

>You might also want to detail, in an abbreviated summary, why it's a
>"better performing implementation."
>  
>
Ok, I will.

Paolo.