add padding + update READMEsI still haven't figured out the smearing issue, but I _did_ figure out how to greatly-improve compatibility with many titles! I added the ability to "pad" the screen, cutting-off any artifacts at the edge. This means that with a bit of tweaking, games like SMB3 and MC Kids work near flawlessly! It _should_ be possible to guess "good" padding values for games by using some heuristic that relies on current mirroring mode, scroll direction, and if the PPUMASK is on... I also updated the README some more, putting a "teaser" for wideNES on the main page, but splitting off the details into it's own page.