When it comes to donating to charities, a few fundamental problems exist. One: There are millions of them. Two: Not too many of us have millions of dollars to donate. Three: Life’s busy. We might be out of town during the Walk for a Cure, might not have time to call in during the annual Jerry Lewis Telethon, might forget we wanted to fish out our credit cards and donate to that charity we heard about last week. Lucky for us — and the world at large — technology is stepping in to help.