Everyone hates the IRS, right? Bunch of pencil-pushing money-grubbers whose goal in life is to squeeze every last dime from the poor taxpayer. That’s the old stereotype, anyway. But a new poll from the Pew Research Center shows that over the last decade or so, the tax-collecting agency has improved in public perception more than any of the other 12 agencies included in the survey. The ratings bump could be a result of new, user-friendly online tax software. Or it could just reflect the fact that the IRS was starting from such a low point — its favorable ratings were…