If Obama was to respond to this piece of nonsense that alone would disqualify him from the presidency. An American president bowing down to the demands of an external party (complete with deadlines for compliance and what not). Like some 1980s action movie where a terrorist demands compliance by a certain time. Obama is many bad things, but I doubt even he is stupid enough to agree to this.
Some people have suggested that he had something quite different to release but didn’t want to interfere with the breaking coverage of the Benghazi emails...so he invented something that frankly wouldn’t cost him anything since he probably already gives more than $5 mil a year to charity (and, on top of that, he knows Obama won’t take him up on it anyway).